Brennan admitted there is a concern that Americans could become complacent since there has n't been a large-scale attack here since 9/11 and since Osama bin Laden has been killed . U.S. to warn against al Qaeda 's ability to inspire Americans to attack . Comment: Drone strikes , targeted raids will be preferred over long wars , he says . U.S. wo n't rule out future unilateral strikes .
U.S. to warn against al Qaeda 's ability to inspire Americans to attack . Comment: Drone strikes , targeted raids will be preferred over long wars , he says . U.S. wo n't rule out future unilateral strikes .