Al Qaeda leader Osama Bin Laden was assassinated in 2011.

Bin Laden, who was responsible for the September 11 terrorist attacks, was shot by US Special Forces on the orders of former President Barack Obama.

This was one of the US's more successful assassinations, Iain King wrote for NBC, because he was a leader of a terror organization and not part of a recognized state.

Former President Bill Clinton said he had a shot at killing bin Laden before 9/ 11, but to do so he would have had to destroy a town and kill 300 innocent people. So he didn't do it.