What would become known as John F. Kennedy International Airport opened in 1948 as New York International Airport though it was commonly known as Idlewild Airport (IATA: IDL, ICAO: KIDL, FAA LID: IDL) after the Idlewild Beach Golf Course that it displaced. It was built to relieve LaGuardia Field, which had become overcrowded after its 1939 opening. In late 1941, mayor Fiorello La Guardia announced that the city had tentatively chosen a large area of marshland on Jamaica Bay, which included the Idlewild Golf Course as well as a summer hotel and a landing strip called the Jamaica Sea-Airport, for a new airfield. Title to the land was conveyed to the city at the end of December 1941. Construction began in 1943, though the airport's final layout was not yet decided upon. About US$60 million was initially spent with governmental funding, but only 1,000 acres (400 ha) of the Idlewild Golf Course site were earmarked for use. The project was renamed Major General Alexander E. Anderson Airport in 1943 after a Queens resident who had commanded a Federalized National Guard unit in the southern United States and died in late 1942. The renaming was vetoed by Mayor La Guardia and reinstated by the New York City Council; in common usage, the airport was still called "Idlewild". In 1944, the New York City Board of Estimate authorized the condemnation of another 1,350 acres (550 ha) for Idlewild. The Port of New York Authority (now the Port Authority of New York and New Jersey) leased the Idlewild property from the City of New York in 1947 and maintains this lease today. In March 1948, the City Council changed the official name to New York International Airport, Anderson Field, but the common name remained "Idlewild" until December 24, 1963. The airport was intended as the world's largest and most efficient, with "no confusion and no congestion". The first flight from Idlewild was on July 1, 1948, with the opening ceremony attended by U.S. President Harry S. Truman and Governor of New York Thomas E. Dewey, who were both running for president in that year's presidential election. The Port Authority cancelled foreign airlines' permits to use LaGuardia, forcing them to move to Idlewild during the next couple of years. Idlewild at the time had a single 79,280-square-foot (7,365 m2) terminal building; by 1949, the terminal building was being expanded to 215,501 square feet (20,021 m2). Further expansions would come in following years, including a control tower in 1952, as well as new and expanded buildings and taxiways. Idlewild opened with six runways and a seventh under construction; runways 1L and 7L were held in reserve and never came into use as runways. Runway 31R (originally 8,000 ft or 2,438 m) is still in use; runway 31L (originally 9,500 ft or 2,896 m) opened soon after the rest of the airport and is still in use; runway 1R closed in 1957 and runway 7R closed around 1966. Runway 4 (originally 8,000 ft, now runway 4L) opened June 1949 and runway 4R was added ten years later. A smaller runway 14/32 was built after runway 7R closed and was used until 1990 by general aviation, STOL, and smaller commuter flights. The first jet airliner to land at Idlewild was an Avro Jetliner flying from Malton Airport in Toronto carrying the world's first cargo of jet airmail on April 18, 1950. A 1951 policy instituted by the Port Authority effectively prohibited jets from landing at the city's airports. After tests demonstrating that it was no noisier than the loudest of the then-current propeller plane, approval was granted for a Sud Aviation Caravelle prototype to be the next jet airliner to land at Idlewild, on May 2, 1957. Later in 1957, the Soviet Union sought approval for two jet-powered Tupolev Tu-104 flights carrying diplomats to land at Idlewild; the Port Authority did not allow them, saying noise tests had to be done first.