 Brennan was present in the Situation Room in May 2011 when the United States conducted the military operation that killed Osama bin Laden.He called Obama's decision to go forward with the mission one of the "gutsiest calls of any president in memory".In the aftermath of the operation, Brennan said that the U.S. troops in the raid had been "met with a great deal of resistance", and bin Laden had used a woman as a human shield.