|The CIA is seeking authority to expand its covert drone campaign in Yemen by launching strikes against terrorism suspects even when it does not know the identities of those who will be killed, U.S. officials said.
Securing permission to use 'signature strikes' would allow the agency to hit targets based solely on intelligence indicating patterns of suspicious behavior, such as imagery showing militants gathering at known al-Qaeda compounds or unloading explosives. The practice has been a core element of the CIA's drone program in Pakistan for several years. But Director David H. Petraeus has requested permission to employ the tactic against the al-Qaeda affiliate in Yemen, which has emerged as the most pressing terrorism threat to the United States, officials said.
If approved, the change would probably accelerate a campaign of U.S. airstrikes in Yemen...