The top US lawyer, Eric Holder, said that it was possible under “extraordinary circumstance”, like 9/11 or the attack on Pearl Harbor in 1941, that the president could authorize lethal military force inside US borders. http://www.bbc.co.uk/news/world-us-canada-21695434 US Senator “alarmed” by how difficult it had been to get President Barack Obama’s administration to clearly define what qualifies as a legitimate target of a drone strike.