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999

There were 4,980 housing units at an average density of 808 per sqmi .

1000

The 1 acres park contains a bench for each of the victims, arranged according to their year of birth, ranging from 1930 to 1998.

1001

According to the 9/11 Commission Report, as Flight 77 was 5 miles west-southwest of the Pentagon, it made a 330-degree spiral turn clockwise.

1002

At the end of the turn, it was descending through 2200 feet , pointed toward the Pentagon and downtown Washington.

1005

Officials estimated temperatures of up to 2000 °F .

1006

Kevin Shaeffer observed a chunk of the aircraft's nose cone and the nose landing gear in the service road between rings B and C. Early in the morning on Friday, September 14, Fairfax County Urban Search and Rescue Team members Carlton Burkhammer and Brian Moravitz came across an "intact seat from the plane's cockpit", while paramedics and firefighters located the two black boxes near the punch out hole in the A-E drive, nearly 300 feet into the building.

1008

The action took place 50 kilometers north of Islamabad.

1011

The highest point in the state is Mount Magazine in the Ouachita Mountains, which rises to 2753 feet above sea level.

1012

Arkansas is home to a dozen Wilderness Areas totaling 158444 acres .

1013

A 2010 United States Forest Service survey determined 18720000 acres of Arkansas's land is forestland, or 56% of the state's total area.

1017

Arkansas is served by 2750 miles of railroad track divided among twenty-six railroad companies including three Class I railroads.

1018

It lies on Abadan Island ( 68 kilometers long, 3–19 km or 2–12 miles wide).

1019

The island is bounded in the west by the Arvand waterway and to the east by the Bahmanshir outlet of the Karun River (the Arvand Rood), 53 kilometers from the Persian Gulf, near the Iran–Iraq border.

1021

The world's highest unconfirmed temperature was a temperature flare up during a heat burst in June 1967, with a temperature of 87 °C .

1022

The lowest recorded temperature in the city range is -4.0 °C .

1023

which was recorded on 20 January 1964 and 3 February 1967 while the highest is 53 °C , recorded on 11 July 1951 and 9 August 1981.

1024

Before the Civil War, Carnegie arranged a merger between Woodruff's company and that of George Pullman, the inventor of a sleeping car for first class travel, which facilitated business travel at distances over 500 miles .

1025

In 1883, Carnegie bought the rival Homestead Steel Works, which included an extensive plant served by tributary coal and iron fields, a 425 miles long railway, and a line of lake steamships.

1026

In 1911, Carnegie became a sympathetic benefactor to George Ellery Hale, who was trying to build the 100 inches Hooker Telescope at Mount Wilson, and donated an additional ten million dollars to the Carnegie Institution with the following suggestion to expedite the construction of the telescope: "I hope the work at Mount Wilson will be vigorously pushed, because I am so anxious to hear the expected results from it.

1027

Less than 20 miles downstream from the dam sat the city of Johnstown.

1029

The 23-minute flight traveled between St. Petersburg, Florida and Tampa, Florida, passing some 50 feet above Tampa Bay in Jannus' Benoist XIV wood and muslin biplane flying boat.

1030

An average US major Boeing 757-200 flies 1252 miles stages 11.3 block hours per day and costs $2,550 per block hour : $923 of ownership, $590 of maintenance, $548 of fuel and $489 of crew; or $13.34 per 186 seats per block hour.

1031

CO2 emissions from the jet fuel burned per passenger on an average 3200 kilometers airline flight is about 353 kilograms (776 pounds).

1032

Loss of natural habitat potential associated with the jet fuel burned per passenger on a 3200 kilometers airline flight is estimated to be 250 square meters (2700 square feet).

1033

Section 125 of the new Australian Constitution provided that land, situated in New South Wales and at least 100 miles from Sydney, would be ceded to the new federal government.

1034

The Australian Capital Territory is the smallest mainland territory (aside from the Jervis Bay Territory) and covers a total land area of 2280 sqkm .

1036

January is the hottest month with an average high of 27 Coulomb .

1037

July is the coldest month when the average high drops to 11 Coulomb .

1038

The highest maximum temperature recorded in the territory was 44 °C on 4 January 2020.

1039

The lowest minimum temperature was -10.0 °C on 11 July 1971.

1040

Average annual rainfall in the territory is 629 mm and there is an average of 108 rain days annually.

1042

Canberra's districts are generally connected by parkways—limited access dual carriageway roads with speed limits generally set at a maximum of 100 kmph .

1047

For a meteor, the standard distance for measurement of magnitudes is at an altitude of 100 kilometers at the observer's zenith.

1053

The NASA crew systems department had installed 34 sqft of Velcro throughout the spacecraft, almost like carpeting.

1060

On February 17, 2007, the parts of CM-012 were moved approximately 90 feet to a newer, environmentally controlled warehouse.

1061

Astronauts Thomas Stafford and Gene Cernan flew the Apollo Lunar Module (LM) to a descent orbit within 8 nautical miles of the lunar surface, the point where powered descent for landing would begin.

1062

The Apollo 10 crew are also the humans who have traveled the farthest away from home, some 408950 kilometers from their homes and families in Houston.

1064

This dress rehearsal for a Moon landing brought the Apollo Lunar Module to 8 nautical miles from the lunar surface, at the point where powered descent would begin on the actual landing.

1065

Practicing this approach orbit would refine knowledge of the lunar gravitational field needed to calibrate the powered descent guidance system to within 1.0 nautical miles needed for a landing.

1068

The lowest measured point in the trajectory was 47400 feet above the lunar surface at 21:29:43 UTC.

1069

The LM crew performed the descent orbit insertion maneuver by firing their descent engine, and tested their craft's landing radar as they approached the 50000 feet altitude where the subsequent Apollo 11 mission would begin powered descent to actually land on the Moon.

1070

Splashdown occurred in the Pacific Ocean on May 26, 1969, at 16:52:23 UTC, about 400 nautical miles east of American Samoa.

1071

Apollo 12 launched on schedule from Kennedy Space Center, under completely overcast rainy skies, encountering wind speeds of 151 knots during ascent, the highest of any Apollo mission.

1073

But the actual touchdown point—approximately 600 feet from Surveyor 3—did cause high velocity sandblasting of the probe.

1074

During the two lunar EVAs, 94 pounds of Moon rocks were collected, For some reason, the total reported does not match the sum of the two EVAs.

1075

After the astronauts cycled the landing radar breaker, the unit successfully acquired a signal near 18000 feet , again just in time.

1076

The second moonwalk, or EVA, was intended to reach the rim of the 1000 feet wide Cone crater.

1077

Later analysis using the pictures they took determined that they had come within an estimated 65 feet of the crater's rim.

1078

Shepard and Mitchell deployed and activated various scientific instruments and experiments and collected almost 100 pounds of lunar samples for return to Earth, including the 20 pound (9 kg) Big Bertha rock.

1079

The command module Kittyhawk splashed down in the South Pacific Ocean on February 9, 1971 at 21:05 [UTC], approximately 760 nautical miles south of American Samoa.

1080

They spent 181 hours on the Moon's surface on extravehicular activity (EVA), and collected 77 kilograms of surface material.

1082

It was launched in a more southerly direction (80–100 degrees azimuth) than previous missions, and the Earth parking orbit was lowered to 166 kilometers .

1083

These two changes meant 1100 pounds more could be launched.

1084

An early version was called MOLAB, which had a closed cabin and would have massed about 6000 pounds ; some scaled-down prototypes were tested in Arizona.

1085

Still, a rover would enhance the J missions, which were to concentrate on science, though its mass was limited to about 500 pounds and it was not then clear that so light a vehicle could be useful.

1086

After Apollo 15 separated from the booster, the S-IVB maneuvered away, and, as planned, impacted the Moon about an hour after the crewed spacecraft entered lunar orbit, though due to an error the impact was 146 kilometers away from the intended target.

1088

Overnight between July 29 and 30, as the crew rested, it became apparent to Mission Control that mass concentrations in the Moon were making Apollo 15's orbit increasingly elliptical—pericynthion was 7 nautical miles by the time the crew was awakened on July 30.

1090

With the problem resolved, Falcon separated from Endeavour at 100:39:16.2, about 25 minutes late, at an altitude of 5 nautical miles .

1092

Aboard Falcon, Scott and Irwin prepared for powered descent initiation (PDI), the burn that was to place them on the lunar surface, and, after Mission Control gave them permission, they initiated PDI at 104:30:09.4 at an altitude of 5 nautical miles , slightly higher than planned.

1093

Part of this was due to an error in the landing path of some 3000 feet , of which CAPCOM Ed Mitchell informed the crew prior to pitchover; part because the craters Scott had relied on in the simulator were difficult to make out under lunar conditions, and he initially could not see Hadley Rille.

1094

Starts at about 5000 feet .

1095

Below about 60 feet , Scott could see nothing of the surface because of the quantities of lunar dust being displaced by Falcon'''s exhaust.

1097

Scott's speed resulted in what was likely the hardest lunar landing of any of the crewed missions, at about 6 feet per second, causing a startled Irwin to yell "Bam!"

1098

Falcon landed at 104:42:29.3 (22:16:29 GMT on July 30), with approximately 103 seconds of fuel remaining, about 1800 feet from the planned landing site.

1099

In total, the two astronauts spent 181 hours outside the LM and collected approximately 77 kilograms of lunar samples.

1100

The pair drove the Lunar Roving Vehicle (LRV), the second produced and used on the Moon, for 26 kilometers .

1101

On the surface, Young and Duke collected 95 kilograms of lunar samples for return to Earth, while Command Module Pilot Ken Mattingly orbited in the command and service module (CSM) above to perform observations.

1102

Geologists chose the area because of a 60 miles wide crater created about 1.8 billion years ago by a large meteorite.

1103

After two orbits, the rocket's third stage reignited for just over five minutes, propelling the craft towards the Moon at about 22000 mph .

1104

Six minutes after the burn of the S-IVB, the command and service module, containing the crew, separated from the rocket and traveled for 15 meters before turning around and retrieving the lunar module from inside the expended rocket stage.

1106

At the end of day two, Apollo 16 was about 140000 nautical miles away from Earth.

1107

At the beginning of day three, the spacecraft was about 157000 nautical miles away from the Earth.

1109

At an altitude of 11142 nautical miles the scientific instrument module (SIM) bay cover was jettisoned.

1110

The maneuver was successful, decreasing the craft's pericynthion to 10 nautical miles .

1111

Because of the delay, Young and Duke began their descent to the surface at an altitude higher than that of any previous mission, at 20 kilometers .

1112

At an altitude of about 4000 meters , Young was able to view the landing site in its entirety.

1113

Throttle-down of the LM's landing engine occurred on time and the spacecraft tilted forward to its landing orientation at an altitude of 2200 meters .

1116

There, at a distance of 1 kilometers from the LM, they sampled material from the vicinity of Flag Crater, which scientists believed penetrated through the upper regolith layer to the underlying Cayley Formation.

1117

The next stop of the day was Buster Crater, about 1 kilometers from the LM.

1118

After departing the immediate landing site in the lunar rover, they arrived at the day's first destination, the Cinco craters, 3 kilometers from the LM.

1119

At 152 meters above the valley floor, the pair were at the highest elevation above the LM of any Apollo mission.

1120

After spending 54 minutes on the slope, they climbed aboard the lunar rover en route to the day's second stop, station five, a crater 20 meters across.

1121

The next stop, station six, was a 10 meters blocky crater, where the astronauts believed they could sample the Cayley Formation as evidenced by the firmer soil found there.

1122

There, they dug a double core and conducted several penetrometer tests along a line stretching 50 meters east of the ALSEP.

1124

Upon arriving at the rim of North Ray crater, they were 4 kilometers away from the LM.

1126

About 1 hour and 22 minutes after arriving, they departed for station 13, a large boulder field about 0.5 kilometers from North Ray.

1127

On the way, they set a lunar speed record, traveling at an estimated 17 kmph downhill.

1128

They arrived at a 3 meters high boulder, which they called 'Shadow Rock'.

1129

Young drove the rover to a point about 90 meters east of the LM, known as the 'VIP site,' so its television camera, controlled remotely by Mission Control, could observe Apollo 16's liftoff from the Moon.

1130

Six minutes after liftoff, at a speed of about 5000 kmph , Young and Duke reached lunar orbit.

1135

After successful parachute deployment and less than 14 minutes after reentry began, the command module splashed down in the Pacific Ocean 350 kilometers southeast of the island of Kiritimati 265 hours, 51 minutes, 5 seconds after liftoff.

1136

In 2-1/2 weeks the satellite was swooping to within a hair-raising 6 miles of the lunar surface at closest approach.

1137

However, due to a communication failure before impact the exact location was unknown until January 2016, when it was discovered within Mare Insularum by the Lunar Reconnaissance Orbiter, approximately 160 miles southwest of Copernicus Crater.

1138

Schanze and a friend discovered a "stamp" on the 36 inches flat metal sheet, which upon further inspection turned out to be a faded copy of the Apollo 16 mission insignia.

1139

In 1969, NASA announced that the backup crew of Apollo 14, slated to fly in 1971, would be Eugene Cernan, Ronald Evans, and former X-15 pilot Joe Engle (whose 16 flights in the X-15 had thrice taken him past the 50 miles border of space).

1140

The launch was visible as far away as 800 kilometers ; observers in Miami, Florida, saw a "red streak" crossing the northern sky.

1141

The astronauts gathered 14 kilograms of samples, took seven gravimeter measurements, and deployed two explosive packages.

1142

The final stop before returning to the LM was Camelot crater; throughout the sojourn, the astronauts collected 34 kilograms of samples, took another seven gravimeter measurements, and deployed three more explosive packages.

1143

The crew collected 66 kilograms of lunar samples and took another nine gravimeter measurements.

1144

The Apollo 17 spacecraft reentered Earth's atmosphere and landed safely in the Pacific Ocean at 2:25 p.m., 6 kilometers from the recovery ship, USS Ticonderoga CV-14 6 .