Air force announced that its youngest B-52 strategic bomber is not sitting in some museum but still flying as the most active bomber mission aircraft on the Minot AFB. rolled off the assembly line in October of 1962, tail number 1040 is the youngster of a aging bombing fleet that expect to continue in service till 2040.
Few naval ships and other aircraft have such a long service in the us military. some examples are:
The US Navy has the soon to be decommissioned USS Enterprise (CVN-65) with fifty one years.
The Bell OH-58 Kiowa has been in service us Army service since 1969.
the US Marines have the CH-46E Sea Knight is the oldest with an average age of 42 years, but is closely followed by the CH-53D Sea Stallion (40 years) and UH-1N Huey (36 years)