It was from their front yard in Melbourne, Fla., that Michael VanKulick captured this previously unseen video of the Challenger disaster, which 28 years ago on Tuesday exploded in a fireball just 73 seconds after launch, killing all seven people aboard. Read More

  The space shuttle Discovery, NASA’s fleet leader and the world’s most-flown spacecraft, arrived in Washington, D.C.Tuesday, where it will go on permanent display at the Smithsonian later this week. Read More: msnbc.msn.com