Obama: Drone strikes have become more precise

President Obama on Friday defended his administration's regular use of drones or other airstrikes to target terror leaders or training camps in Somalia, Libya and Yemen.

Obama acknowledged that in the past the strikes had sometimes inadvertently killed civilians, but procedures for approving such strikes has improved.

"There has been in the past legitimate criticism that the architecture, the legal architecture around the use of drone strikes or other kinetic strikes wasn’t as precise as it should have been, and there’s no doubt that civilia