A Comorian policeman maintains order near the scene where the missing Yemenia Airbus 310-300 airplane crashed in Mitsamiouli, 30 km (19 miles) north of Comoros' capital Moroni July 1, 2009. French and U.S. aircraft joined the hunt on Wednesday for possible survivors from a plane that crashed off the Comoros archipelago, while in Paris expatriate Comorans tried to block another flight by the same airline. REUTERS/Thomas Mukoya (COMOROS DISASTER MILITARY TRANSPORT)