On 14 June 2010, the agreement for the development of the project was signed between the US Army Space and Missile Defense Command/Army Forces Strategic Command and Northrop Grumman.
Aftalen om udvikling af projektet blev underskrevet den 14. juni 2010 af U.S. Army Space and Missile Defense Command/Army Forces Strategic Command og den våbenproducenten Northrop Grumman.