David M. Brown
David McDowell Brown (April 16, 1956 – February 1, 2003) was a United States Navy captain and a NASA astronaut. He died on his first spaceflight, when the Space Shuttle "Columbia" (STS-107) disintegrated during orbital reentry into the Earth's atmosphere. Brown became an astronaut in 1996, but had not served on a space mission prior to the "Columbia" disaster. Brown was posthumously awarded the Congressional Space Medal of Honor.
Brown, the 1986 recipient of the Navy Operational Flight Surgeon of the Year award, received numerous decorations including:
The symbol indicates a posthumous award.
Columbia (supercomputer)
Columbia debuted as the second most powerful supercomputer on the TOP500 list in November 2004 at a LINPACK rating of 51.87 teraflops, or 51.87 trillion floating point calculations per second. By June 2007 it had dropped to 13th.