low-rise hotel, and a row of office buildings along the north side of the main parking lot. The design also included a two-level road in front of the terminal to separate arrival and departure traffic and a federally owned limited access highway connecting the terminal to the Capital Beltway (I-495) about to the east. (Eventually, the highway system grew to include a parallel toll road to handle commuter traffic and an extension to connect to I-66). The access road had a wide median strip to allow the construction of a passenger rail line, which opened as an extension of the Washington Metro's Silver Line on November 15, 2022. Notable operations and milestones The first scheduled flight at Dulles was an Eastern Air Lines Super Electra from Newark International Airport in New Jersey on November 19, 1962. Dulles was initially considered a white elephant, being far out of town with few flights; in 1965 Dulles averaged 89 airline operations a day while National Airport (now Reagan) averaged 600 despite not allowing jets. (Dulles got its first transatlantic nonstop in June 1964.) Airport operations grew along with Virginia suburbs and the Dulles Technology Corridor; perimeter and slot restrictions at National forced long-distance flights to use Dulles. In 1969, Dulles had 2.01 million passengers while National had 9.9 million. The era of widebody jets began on January 15, 1970, when First Lady Pat Nixon christened a Pan Am Boeing 747-100 at Dulles in the presence of Pan Am chairman Najeeb Halaby. Rather than a traditional champagne bottle, red, white, and blue water was sprayed on the aircraft. Pan Am's first Boeing 747 flight was from New York JFK to London Heathrow Airport. On May 24, 1976, supersonic flights between the U.S. and Europe began with the arrival of a British Airways Concorde from London Heathrow and an Air France Concorde from Paris Charles De Gaulle. The two were lined nose-to-nose at Dulles for photos. On June 12, 1983, the Space Shuttle Enterprise arrived at Dulles atop a modified Boeing 747 after touring Europe and before returning to Edwards Air Force Base. Two years later Enterprise returned and was placed in a storage hangar near Runway 12/30 to await construction of a planned expansion to the National Air and Space Museum. Enterprise left Dulles on April 27, 2012, for its new home at the Intrepid Sea, Air & Space Museum in New York City.