query: Who is the current head of the Royal Air Force?
passage: Chief of the Air Staff (United Kingdom)
The Chief of the Air Staff (CAS) is the professional head of the Royal Air Force and a member of both the Chiefs of Staff Committee and the Air Force Board. The post was created in 1918 with Major General Sir Hugh Trenchard as the first incumbent. The current and 29th Chief of the Air Staff is Air Chief Marshal Sir Stephen Hillier, who succeeded Sir Andrew Pulford in July 2016.[2][3]
passage: Jack Weinstein (general)
Jack Weinstein is a Lieutenant General in the United States Air Force. He is the Deputy Chief of Staff for Strategic Deterrence and Nuclear Integration, Headquarters U. S. Air Force, Washington D.C. In this capacity, Weinstein is responsible to the Secretary and Chief of Staff of the Air Force for focus on Nuclear Deterrence Operations. Previously he was Commander, Twentieth Air Force, part of the Air Force Global Strike Command, and Commander, Task Force 214, part of the U.S. Strategic Command, at Francis E. Warren Air Force Base, in Wyoming.