Though Ronald Reagan's two terms as president saw no major changes to Air Force One, the manufacture of the presidential aircraft version of the 747 began during his presidency. The USAF issued a Request For Proposal in 1985 for two wide-body aircraft with a minimum of three engines and an unrefueled range of 6,000 miles (9,700 km). Boeing with the 747 and McDonnell Douglas with the DC-10 submitted proposals, and the Reagan Administration ordered two identical 747s to replace the aging 707 VC-137 variants he used.[47] The interior designs, drawn up by First Lady Nancy Reagan, were reminiscent of the American Southwest.[47]