New al Qaeda branch infiltrates Pakistan 's navy and tries to hijack vessel . Hasan was sentenced to death by a military court for the November 5 , 2009 , rampage , which authorities said the American-born Muslim carried out because he did not want to deploy to Afghanistan to fight other Muslims . The plot included plans to launch rocket attacks on U.S. ships in the Indian Ocean , authorities say . - May : A suicide bomber kills at least 20 people when he blows himself up outside a Shiite mosque in Pakistan's largest city of Karachi.
New al Qaeda branch infiltrates Pakistan 's navy and tries to hijack vessel . The plot included plans to launch rocket attacks on U.S. ships in the Indian Ocean , authorities say . - May : A suicide bomber kills at least 20 people when he blows himself up outside a Shiite mosque in Pakistan's largest city of Karachi.