The advent of wide-body aircraft posed opportunities and challenges for aviation. In 1971, Aer Lingus took delivery of two new Boeing 747 aircraft; the first one arrived in March and, shortly afterwards, performed a flyover above O'Connell Street in Dublin on Saint Patrick's Day; a third Boeing 747 was delivered later that decade. To cope with this, a new £10 million passenger terminal capable of handling six million passengers per year, which became known as Terminal 1, was opened in June 1972. The growth which was anticipated at Dublin's airport (and provided for through heavy investment by the airport and Aer Lingus) during the 1970s did not materialise immediately.