OSIRIS-REx Mission's Earth Slingshot - NASA Explains

NASA OSIRIS-REx mission's deputy program scientist Dr. Christin Richey talks to Space.com's Doris Salazar about the mission and the gravity assist the probe needs to get to asteroid Bennu. Follow Doris on Twitter: http://www.twitter.com/salazar_elin Credit: Space.com / NASA Goddard Space Flight Center / edited by Steve Spaleta http://www.twitter.com/stevespaleta