"NASA intends to issue an Asteroid Redirect Mission Broad Agency Announcement (BAA) on March 21, 2014. NASA is developing concepts for the Asteroid Redirect Mission, which would use a robotic spacecraft to capture a small near-Earth asteroid, or remove a boulder from the surface of a larger asteroid, and redirect the asteroid mass into a stable orbit around the moon. Astronauts aboard the Orion spacecraft launched on the Space Launch System would rendezvous with the asteroid mass in lunar orbit, and collect samples for return to Earth."
Bolden's Confusing Asteroid Mission Rationale (Revised), earlier post
"To be blunt, there is no compelling rationale for the Asteroid Redirect & Return Mission (ARRM). There never has been. Based on the way that Charlie Bolden continually stumbles through his conflicting explanation of what the mission is and is not, there never will be a clear reason why it needs to be done."