Just to the West of Johannesburg lies the Lanseria International Airport, a general Aviation airfield that first started to take shape in 1972, when two Pretoria pilots forsaw the need for a general aviation airport to the West of Johannesburg. Despite bad weather conditions during the construction, and a shortage of steel for the hangers, the international airport was completed on schedule, and was officially opened to air traffic on 16 August 1974. On that day, a Learjet ZS-MTD became the first jet to land at Lanseria. Lanseria Airport is ideally situated for corporate jets traveling to Johannesburg or Pretoria. With the recent expansion of the Main Terminal building (completed in 2002) and the upgrade of all the runways and taxiways, Lanseria is more geared than ever before to meet and exceed, the high demands of international aviation. Lanseria Airport is also close to the World Heritage Site of the Cradle of Humankind.