the airport site. Only four years later it was clear that the terminal was already too small for the demand. In 1961, Frankfurt already had 2.2 million passengers and 81,000 take-offs and landings, making it the second busiest airport in Europe behind Heathrow Airport, London. In 1962, it was decided to build an even larger terminal with a capacity of 30 million passengers per year. Work on this terminal began in 1965. The southern runway was extended to in 1964. In 1970, a new hangar was inaugurated; this accommodated six jet aircraft and was the world's largest hangar at the time. The new main terminal The new terminal, called Terminal Mitte (Central Terminal, today known as Terminal 1) is divided into three concourses (A, B and C) with 56 gates and an electric baggage handling system. Everything opened to the public on 14 March 1972. It was assumed that the terminal capacity would be sufficient for the next 30 years. Along with the new terminal a railway station (Frankfurt Airport station) was opened, the first airport railway station in the Federal Republic of Germany. A few days later the old Empfangsanlage Ost was closed. The third runway Planning for a third runway (called Startbahn 18 West) began in 1973. This project spawned massive protests by residents and environmentalists. The main points of conflict were increasing noise and pollution and the cutting down of protected trees in the Frankfurt City Forest. While the protests and related lawsuits were unsuccessful in preventing construction, the Startbahn West protests were one of the major crystallisation points for the German environmental movement of the 1980s. The protests even continued after the runway had been opened in 1984 and in 1987 two police officers were killed by a gunman. This incident ended the Startbahn West protests for good. Because of its orientation in the north–south direction, in contrast to the other east–west runways, the use of the third runway is limited. The Startbahn West can only be used for takeoffs to the south to avoid interference with air traffic on the other runways. Owing to this restriction the runway must be partially or fully closed when northward winds are too strong. Terminal 2 and the second railway station In 1990, work on a new terminal (Terminal 2) began because it was anticipated that Terminal Mitte would reach its capacity limit sooner than expected. The new terminal,