Saturn Airways. Oakland became one of the largest overhaul and maintenance operations in the country when Aircraft Engine and Maintenance Company (AEMCO) processed thousands of aircraft. The airport's first Jet Age terminal (now Terminal 1) was designed by John Carl Warnecke & Associates and opened in 1962, part of a $20 million expansion on bay fill that included the 10,000-foot (3048 m) runway 11/29 (now 12/30). The May 1963 OAG showed 15 airline flights arriving in Oakland each day, including nine from San Francisco; in June 1963, TWA flew Oakland's first scheduled jet, a Convair 880, to Chicago. American Airlines scheduled service from Oakland to Phoenix then into Dallas using the Boeing 720 aircraft. Pacific Southwest Airlines (PSA) provided several flights within California from OAK using Boeing 727 and DC-9 aircraft. United Airlines introduced non-stop service to Chicago, and on the San Francisco-Oakland-Los Angeles route using the Boeing 727. During the Vietnam War, World Airways shuttled thousands of military passengers through Oakland to their bases in Southeast Asia, and an international arrivals facility was built, allowing the airport to handle international flights for the first time. World Airways had broken ground on the World Airways Maintenance Center at Oakland International Airport. The maintenance hangar could store four Boeing 747s. It opened in May 1973. During its operation, World Airways provided contract maintenance services for 14 airlines in the facility. By 1988, World Airways vacated the Oakland maintenance base and moved its headquarters to Washington Dulles. That same year, United Airlines assumed the lease on the maintenance base. After the war, Oakland's traffic slumped, but airline deregulation prompted several low-fare carriers to begin flights. This increase prompted the airport to build a $16.3 million second terminal, the Lionel J. Wilson Terminal 2, with seven gates for PSA and AirCal service. In the mid-1980s, People Express Airlines provided scheduled Boeing 747 transcontinental flights from OAK to Newark. SFO Helicopter Airlines served scheduled passenger flights between SFO and the Oakland Convention Center from OAK for many years until 1985. In 1987, British Airways and Air France Concorde visited Oakland to provide supersonic two-hour flights to the Pacific halfway to Hawaii and back to Oakland. Additionally, Concorde returned for a special around-the-world trip covering 38,215 miles over a three-week tour in March 1989. FedEx Express opened a air cargo base at OAK in 1988, which is now one of the busiest air freight terminals