KEY POINTS:
British pilot Nigel Lamb (from left), US pilot Kirby Chambliss, Spanish pilot Alejandro MacLean and British pilot Paul Bonhomme fly near the famous Christ the Redeemer statue atop Corcovado mountain during a preview flight for the Red Bull Air Race in Rio de Janeiro on Saturday over Guanabara Bay.
Pilots must navigate a slalom course made of air-filled pylons at speeds reaching 400km/h.
