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: Seven dead in space shuttle disaster The American space shuttle, Challenger, has exploded killing all seven astronauts on board. The five men and two women-including the first teacher in space-were just over a minute into their flight from Cape Canaveral in Florida when the Challenger blew up.986: Seven dead in space shuttle disaster The American space shuttle, Challenger, has exploded killing all seven astronauts on board. The five men and two women-including the first teacher in space-were just over a minute into their flight from Cape Canaveral in Florida when the Challenger blew up.