File photo : France's Camille Muffat won the final of the 400 Meters Freestyle Women of swimming of the 2012 London Olympics Games in London, England on July 29h, 2012. Eight French nationals and their two Argentine pilots all died when two helicopters collided in La Rioja province in north-west Argentina. Yachtswoman Florence Arthaud, Olympic swimmer Camille Muffat and Olympic boxer Alexis Vastine all died. The helicopters were involved in the filming of TV survival show Dropped. Photo by Henri Szwarc/ABACAPRESS.COM