Pave Low

Sikorsky MH-53M Pave Low IV.
CSAR (combat search and rescue) variant of the Sikorsky HH-53 "Super Jolly Green Giant" helicopter.
This aircraft (# 73-1649) is actually one of the MH-53s, that my brother serviced and repaired when he was in the U.S. Air Force.
It was retired in 2008 and is now on display at The Pima Air & Space Museum in Tucson,Arizona.