BBC
Bbc: Were Lost Tiles to Blame?
From February 2003, a Q&A discussing damaged tiles and other problems that the Space Shuttle Columbia faced during its re-entry and subsequent explosion.
US Geological Survey
Usgs: Tsunami & Earthquake Research
The USGS provides an extensive section of information about tsunamis. The items presented are the basics of tsunamis regarding the Great San Francisco earthquake of April 18, 1906, tsunamis in the U.S. Pacific Northwest, and the 1998...
BBC
Bbc: Columbia: Space Pioneer
The BBC provides a brief profile of the Space Shuttle Columbia before its demise in 2003.