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.
A secret NASA tape reveals that the crew of the shuttle Challenger not only survived the explosion that ripped the vessel apart; they screamed, cried, cursed and prayed for three hellish minutes before they slammed into the Atlantic and perished on January 28, 1986.