 Complete the following phrase:  In the film, the music is played during the opening sequence with fifty Heinkel aircraft, which were actually aircraft built by Spains CASA. These aircraft had been flying in Spains air force until 1968. These Spanish bomber aircraft also had Rolls-Royce Merlin engines; the aircraft during the war had Daimler-Benz engines. The aircraft had been obtained by Group Captain T.G. Hamish Mahaddie. The famous opening sequence of the film was shot in March 1968 at Tablada Aerodrome Seville Airport in Andalusia, southern Spain. The film was produced by United Artists. There is a scene showing the 