http://spaceflight.nasa.gov/shuttle/investigation/index.html ____________________________ Detailed web version of loss of sensor timeline - http://spaceflight.nasa.gov/shuttle/investigation/sensors/index.html A good FAQ on the loss of Columbia can be found here - http://www.io.com/~o_m/columbia_loss_faq.html Source: Ray, ARocket -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.