Feb 12 No Indication of Problems During Columbia Flight, Official Says NASA Administrator Sean O'Keefe on Wednesday told a congressional committee that he could not yet determine what caused the space shuttle Columbia to break up during re-entry on Feb. 1, but said investigation efforts are continuing. Continue reading
Feb 06 Watch Shuttle Columbia Disaster in Space The search for debris from the shuttle Columbia continued today. Gwen Ifill discusses the investigation with the White House correspondent for The New York Times and a former astronaut. Continue watching
Feb 06 Watch Background: Shuttle Columbia Disaster in Space The search for debris from the shuttle Columbia continued today. Kwame Holman reports. Continue watching
Feb 04 Watch Reaching for the Stars: Space Shuttle Columbia President Bush led mourners Tuesday in a ceremony honoring the seven astronauts who died aboard the Space Shuttle Columbia. Four guests discuss what makes exploring space -- and the people who do it -- so compelling. Continue watching
Feb 03 Investigators Widen Columbia Recovery Field Hundreds of police and soldiers continued their search for wreckage from the Space Shuttle Columbia Monday, covering a growing debris field that cut a swath more than 100 miles long and 10 miles wide across east Texas and Louisiana. Continue reading
Feb 03 Watch Unanswered Questions About Shuttle Columbia The loss of space shuttle Columbia raises questions about the safety of NASA flights and the agency's budget limitations. Experts discuss the future of the space agency and whether space travel is worth the risk of losing astronauts. Continue watching
Feb 01 Space Shuttle Columbia Disintegrates Upon Re-Entry The space shuttle Columbia disintegrated upon re-entry over Texas Saturday morning moments before its seven-member crew was scheduled to land in Florida. Continue reading
Feb 01 NASA Statement on the Loss of the Space Shuttle Columbia By PBS News Hour The following is the text of a NASA statement on the loss of the Space Shuttle Columbia. Continue reading
Jan 07 Clonaid’s Deadline Passes With No Proof of Human Clone French company Clonaid's self-imposed 10-day deadline for providing DNA proof of the existence of the first human clone passed Tuesday without any new evidence from scientists. Continue reading
Jan 06 Watch You’ve Got E-mail E-mail, used by almost 90 million Americans, has been changing human communication for almost a decade. Terence Smith reports on e-mail and its effects on American culture. Continue watching