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.
That's a solid rocket fuel system, and they ignite at T-0 and liftoff of the space shuttle system. The solid rocket fuel burns for 2 minutes and 5 seconds, after which they begin to burn out and tail off, and separation of the boosters from the external tank occurs 2 minutes and 7 seconds into flight.