 Amos retired from active duty on 1 December 2014.In November 2010, shortly after becoming commandant, Amos, along with the Chief of Naval Operations and the Chief of Staff of the United States Air Force, were notified of an over $4 billion shortfall in the JSF Program.Reacting to this and the steadily rising costs and delays in the program, Secretary of Defense Robert Gates called a meeting with Secretary of the Navy Ray Mabus and Amos, ostensibly to cancel the Marine variant, the F-35B.