along the northern edge of the older field. The March 1939 OAG shows 47 weekday departures: 13 on United, 13 American, 9 TWA, 4 Northwest, and two each on Eastern, Braniff, Pennsylvania Central, and C&S. New York's airport (Newark, then LaGuardia by the end of 1939) was then the busiest airline airport in the United States, but Midway passed LaGuardia in 1948 and kept the title until 1960. The record-breaking 1945 Japan–Washington flight of B-29s refueled at the airport on their way to Washington, DC. In July 1949, the airport was renamed after the Battle of Midway. That year, Midway saw 3.2 million passengers; passengers peaked at 10 million in 1959. The diagram on the January 1951 C&GS approach chart shows four parallel pairs of runways, all 4240 ft or less except for 5730-ft runway 13R (current runway 13C) and 5230-ft runway 4R. The April 1957 OAG shows 414 weekday fixed-wing departures from Midway: 83 American, 83 United, 56 TWA, 40 Capital, 35 North Central, 28 Delta, 27 Eastern, 22 Northwest, 19 Ozark, 11 Braniff, 5 Trans-Canada, and 5 Lake Central. Air France, Lufthansa, and REAL (of Brazil) had a few flights per week. Midway was running out of room and in any case could not handle the 707 and DC-8 jets that appeared in 1959; every Chicago jet flight had to use O'Hare, which had opened to the airlines in 1955. Electras and Viscounts could have continued to fly out of Midway, but O'Hare's new terminal opened in 1962, allowing airlines to consolidate their flights. From July 1962 until United returned in July 1964, Midway's only scheduled airline was Chicago Helicopter. In August 1966, a total of four fixed-wing arrivals were scheduled, all United 727s (United was alone at Midway until early 1968). Post-O'Hare reconstruction (1963–1993) By 1967 reconstruction began at the airport, adding three new concourses with 28 gates and three ticket counters, and in 1968 the city invested $10 million in renovation funds. (For a few months during the 1967 renovation Midway had no scheduled airline flights.) The funds partly supported construction of the Stevenson Expressway, and Midway saw the return of major airlines that year, with 1,663,074 passengers on smaller-capacity, shorter range twin-jet and trijet airliners such as the McDonnell Douglas DC-9, BAC One-Eleven, Boeing 727, and Boeing 737 that could use Midway's runways, which the Boeing 707 and Douglas DC-8 could not. In May 1968