Space Shuttle Lost
Seventeen years and four days after the explosion of Challenger (MeFi thread), it seems that the space shuttle Columbia exploded. Seven astronauts were on board. You can find links and updates in this MetaFilter thread (a few more here) and the Columbia landing journal of Florida today or at the Mission Status Center of Spaceflight Now.
Meldungen gibt es auch bei der Tagesschau online und bei Spiegel online.