Operation Atlas was a terrorist-attack drill/mockup that took place on 4 June 2008, at the Logan airport in Boston, Massachusetts. The massive operation involved real airplanes and assault teams, as in an authentic case. In the plot, a band of "terrorists", "hell-bent on death and destruction," successfully smuggled weapons and explosives onto a commercial airliner, a United Airlines Boeing 757 and threatened to use the aircraft as a missile.