The staff of Sky & Telescope offers its condolences to the families of the seven astronauts lost in Saturday's tragic breakup of the Space Shuttle Columbia.
NASA asks that if you find debris from the spacecraft, call the Johnson Space Center Emergency Operations Center, (281) 483-3388. Do not touch the debris as hazardous chemicals may be present. Any images of the reentry can be sent to NASA via FTP. Instructions have been provided at the Johnson Space Center website.
For the most recent information about the tragedy:
Johnson Space Center