 Complete the following phrase:  The official mission of the currently operating Naval Special Warfare Development Group mission is to provide centralized management for the test, evaluation, and development of equipment technology and Techniques, Tactics and Procedures for Naval Special Warfare. DEVGRU and the Armys Delta Force train and deploy together on counter-terrorist missions usually as part of a joint special operations task force JSOTF. The Central Intelligence Agencys highly secretive Special Activities Center and more specifically its elite Special Operations Group often works with, and recruits from, DEVGRU. The combination of these units led ultimately to the killing of Al-Qaeda leader Osama bin Laden in 