NASA astronomers are monitoring an asteroid--named 2007 WD5--that is headed in the direction of Mars. The 164-foot wide asteroid is traveling at about 28,000 miles per hour. New data observation data shows that the space rock has a 1-in-25 chance of colliding with the red planet, scientists say. We'll find out why astronomers are hoping for impact.
Produced by Flora Lichtman, Correspondent and Managing Editor, Video