heart murmur a sound additional to the normal heart sounds, heard on auscultation of the heart. Many murmurs are of no significance (innocent, physiological murmurs), particularly in young children, or due to increased blood flow through the heart during exercise, or in pregnancy.
Columbia Space Shuttle Disaster. On February 1, 2003, the space shuttle Columbia was returning from its 28th mission when, 16 minutes to touchdown, the shuttle incinerated and broke apart over Texas. Communication between the Columbia crew and Mission Control captures the last moments of the flight.
1986 Following a number of trouble free years in Space Exploration the Space Shuttle Challenger explodes shortly after take off watched by people live on TV around the world.t was piloted by Dick Rutan and Jeana Yeager. The record-breaking around the world flight took nine days and they traveled a total of 25,012 miles. When they landed back at Edwards Air Force Base, the Rutan Voyager had only five gallons of fuel left in its tank.