A NASA spacecraft has successfully slammed into an asteroid called Dimorphos. The Double Asteroid Redirection Test mission, also known as DART, spacecraft has been traveling to reach its asteroid target since launching in November 2021. On Monday, it hit its target, going about 13,421 miles per hour. CNN Space and Defense correspondent Kristin Fisher and Col. Cedric Leighton (Ret.) join CNN’s Erin Burnett to discuss. #CNN #News