Many Americans might have sighed in relief when President Obama announced the death of the terrorist instigator Anwar Al-Awlaki in 2011.
But as heinous as his words were, and as awful the actions he's accused of plotting, Al-Awlaki was an American citizen, the first to die by drone strike by presidential order.
The story and the events leading to and from it are told in Objective Troy: A Terrorist, A President and the Rise of the Drone, by longtime New York Times terrorism reporter Scott Shane.
He explores the military and moral issues in an hour of the Exchange.
