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.
Space Shuttle Disintegrates; Seven Astronauts Killed. CAPE CANAVERAL, Fla. â Space Shuttle Columbia blew up and disintegrated in flames 39 miles over Texas Saturday morning, killing all seven astronauts aboard and scattering debris over up to four states and the Gulf of Mexico.