AP Sources: Bin Laden documents sharpen US aim

US officials say counterterrorism teams are following new leads and tracking possible new targets as experts finish sifting through files from Osama bin Laden's Pakistani hideout.

The US has stepped up surveillance of al-Qaeda operatives who were previously thought less important, after reading their correspondence with bin Laden. The files were taken in a May 2 Navy SEAL raid on the terror leader's compound. (AP)