Elements of other Unified Combatant Commands, especially United States Special Operations Command (USSOCOM), operate in the CENTCOM area. It appears that SOCCENT does not direct the secretive Task Force 88, the ad-hoc grouping of Joint Special Operations Command 'black' units such as Delta Force and Army Rangers, which is tasked to pursue the most sensitive high-value targets such as Al Qaeda and the Taliban leadership since 11 September 2001. Rather TF 77, which started out as Task Force 11 and has gone through a number of name/number changes, reports directly to Joint Special Operations Command, part of USSOCOM.[citation needed]