had been built against an order placed by Mitsui Group, for five aircraft, who intended to lease them to All Nippon Airways (ANA). But, instead, ANA decided to order the Lockheed L-1011 Tristar. Before offering, on behalf of Mitsui, the aircraft to Laker, McDonnell Douglas had asked British Caledonian (BCal) whether it was interested. BCal was looking for a widebody replacement for its ageing Boeing 707s and Vickers VC10s. BCal rejected this offer because the aircraft had insufficient range to fly non-stop from Gatwick to the distant points on its network. Despite these drawbacks, Laker Airways took two of those five Mitsui (originally intended for ANA) ordered aircraft. The three remaining Mitsui aircraft went to Turkish Airlines. One of these later crashed as Turkish Airlines Flight 981. The airline concluded it could fly non-stop from the UK to any point east of the Rockies by keeping the baggage limit at and reducing single-class seating from 380 to 345. The saving could be used to carry more fuel. The calculations had shown that even with reduced seating, it had to fill only 52% of the seats to break even. Moreover, Laker Airways had figured that the aircraft's low break-even seat factor would enable it to operate its proposed London – New York Skytrain with a lower break-even factor compared to the Boeing 707, an ageing narrow-bodied aircraft whose costs were higher per passenger. The DC-10s also had huge potential to boost the projected profitability of Skytrain. Revised estimates anticipated an average load factor of 70–75% and raised the traffic forecast for the first year of operation to 250,000 passengers each way. This was almost three times the original 707-based forecast. These factors swung the firm in favour of McDonnell-Douglas's offer. A Laker Airways McDonnell Douglas DC-10 series 10 was one of four widebodies that were specially flown in for the pre-inauguration of the then-new terminal building at Berlin's Tegel Airport on 23 October 1974. (A British Airways (BA) Lockheed L-1011 Tristar 1, a Pan Am Boeing 747-100 and an Air France Airbus A300 B2 were the other widebodies specially flown in on that day to mark this occasion.) Introduction of Skytrain The early 1970s saw the airline and its owner battle with aviation authorities in the UK and US to gain approval for a low-cost, "no frills" transatlantic service to link London and New York daily during the peak summer period