In 1944 Allegheny County officials proposed to expand the military airport with the addition of a commercial passenger terminal to relieve the Allegheny County Airport, which was built in 1926 and was becoming too small. Ground was broken on the new passenger terminal on July 18, 1946. The new terminal would eventually cost $33 million ($ present day dollars) and was built entirely by Pittsburgh-area companies. The new airport, christened as Greater Pittsburgh Airport (renamed Greater Pittsburgh International Airport in 1972 upon the opening of the International Arrivals Building) opened on May 31, 1952. The first flight was on June 3, 1952. In its full year of operation in 1953, more than 1.4 million passengers used the terminal. "Greater Pitt" was then considered modern and spacious. The airport terminal was the largest in the United States, second only to Idlewild Airport's (now JFK Airport) in New York when it was completed five years later. The airport's capacity is one of its most valuable assets.