This was taken at the USS Alabama in Mobile, Alabama. It is probably a US Navy aircraft.
B-52D Stratofortress "Calamity Jane".
It is a long-range, subsonic, strategic bomber operated by the US Air Force (not the Navy) since 1955.
The aircraft you see here was amoung 170 B-52Ds manufactured by Boeing Airplane Company, and was equipped exclusively for long-range bombing missions. "Calamity Jane", as she is called, has been demilitarized, but remains in the high camouflage used during Vietnam operations. (Source)
That is a USAF B-52D. These were used extensively in Vietnam, and were retired after. The 2 models that remained in operation after 1983, when the last D-model was retired, were the G and H models. The G models were retired in 1991, leaving only H models still in active service. They are expected to last into the 2050s. The last B-52 built was in 1962, which means that the aircraft will have nearly a century of service. I am honored that I was assigned as a B-52G Crew Chief, 1989-1995