Al-Qaida No. 2 killed by US drone

June 5, 2012 12:00:00 AM PDT
A U.S. drone strike in northern Pakistan has killed al-Qaida's second-in-command, American officials said Tuesday, the biggest success so far in the controversial military program and a significant setback to a terror network that has lost a string of top figures since the death of Osama bin Laden last year.