The 81st Troop Carrier Squadron is an inactive United States Air Force unit whose last assignment was with the 436th Troop Carrier Group, based at Grenier Air Force Base, a former United States Air Force base located three miles (5 km) south of the central business district of what state? 
Grenier Air Force Base: Grenier Air Force Base is a former United States Air Force base located three miles (5 km) south of the central business district of Manchester, New Hampshire, on the county line of Hillsborough and Rockingham counties.
i don't know