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.
1 A Major Malfunction: The Fateful Launch Of Challenger On this day, 28 January, in 1986, one of the worst and most public disasters in U.S. space history... 2  Challenger â 30 Years On On the 30th anniversary of the Space Shuttle Challenger disaster, Space Safety Magazine is... â Oh God, Tell Me Iâm Not Seeing this!!â On the 30th anniversary of the Space Shuttle Challenger disaster, Space Safety Magazine is... Remembering the Space Shuttle Challenger Crew On January 28, 1986, six American astronauts and a schoolteacher lost their lives after the... Challenger: A Management Failure The Space Shuttle Challenger disaster was probably the most significant event, in terms of its... A Major Malfunction: The Fateful Launch Of Challenger On this day, 28 January, in 1986, one of the worst and most public disasters in U.S. space history... Challenger â 30 Years On On the 30th anniversary of the Space Shuttle Challenger disaster, Space Safety Magazine is...