FLORIDA TODAY: STS-107 Columbia landing journal gives regular updates during the shuttle landing, including this unsettling entry: 9:20 a.m. EST, Feb. 1, 2003: NASA has lost communication with the orbiter and has no tracking data.
NASA Space Shuttle Launches gives the complete list of all shuttle missions. If I’m reading it correctly, STS-107 was the 113th shuttle mission. Columbia (OV-102) was the first shuttle ever built and participated in flight STS-1 on 4/12/81.
President Bush’s remarks on the loss of the shuttle. [Christian Science Monitor]