The current Manchester airport began to take shape as a joint civil-military facility in the 1960s. The first major development at MHT was the construction of a new civilian terminal, and the first modern air traffic control tower in New Hampshire, in 1961. Roscoe A. Ammon, a successful businessman, donated $500,000 for the construction of the new civilian air terminal. Unfortunately, Roscoe Ammon died of cancer less than two weeks before the terminal was opened, and thus missed the opportunity to see the product of his generous donation. A new passenger terminal was later built in 1994. In 1966, the Air Force removed its remaining forces and closed Grenier Air Force Base, leaving the airport open for expansion. In 1978 the airfield was renamed "Manchester Airport".