President Barack Obama talks about national security, Thursday, May 23, 2013, at the National Defense University at Fort McNair in Washington. (AP Photo/Pablo Martinez Monsivais)
Obama defends drone strikes
President Barack Obama on Thursday defended America's controversial drone attacks as legal, effective and a necessary linchpin in an evolving U.S. counterterrorism policy.
4 Americans killed since 2009 by drones
Soldier accused of sexual abuse
