NASA Associate Administrator for Human Exploration and Operations, William Gerstenmaier, right, talks as NASA Associate Administrator Robert Lightfoot, left, NASA Associate Administrator Science John Grunsfeld, Ph.D, second from left, and NASA Associate Administrator for Space Technology, Mike Gazarik, Ph.D, look on during the Asteroid Initiative Industry and Partner Day at NASA Headquarters on Tuesday, June 18, 2013 in Washington. During the event NASA Deputy Administrator Lori Garver and other senior NASA officials discussed the progress being made on NASA's mission to capture, redirect, and explore an asteroid. NASA also announced an Asteroid Grand Challenge focused on finding all asteroid threats to human populations and knowing what to do about them. Photo Credit: (NASA/Bill Ingalls)