The Development Group Naval Special Warfare of the US (abbreviated as NSWDG), commonly known as DEVGRU and informally by its former name SEAL Team 6, is a of the two Special Units and counterterrorist missions first level of the United States Special Operations Command; the other is the Delta Force already talk another day.
While DEVGRU is administratively supported by the Naval Special Warfare Command as the other teams SEAL, operationally follow the orders of the Joint Special Operations Command. The origins of this group arise after Operation Eagle Claw failed in 1980 in an attempt to free the American hostages held in the embassy in Tehran.
The DEVGRU is the evolution of SEAL Team 6 was dissolved in 1987 to make way for the new unit. Members are selected from the SEAL teams.
The vast majority of information about DEVGRU is the high-level classified information and details of its activities are therefore not commented nor the White House nor the United States Department of Defense. But for example it exceeded the secrecy that was this unit that killed Bin Laden and carving his place in history