Airmen of the Brazilian Air Force sit in the cabin of a R99 radar plane, which is taking part in the search operation over the area where Air France flight AF447 went missing en route from Rio to Paris, at a military base in Recife June 5, 2009. Airbus has warned airline crews to follow standard procedures if they suspect speed indicators are faulty, suggesting that technical malfunction may have played a role in this week's Air France crash. REUTERS/Paulo Whitaker (BRAZIL TRANSPORT DISASTER MILITARY)
REUTERS/PAULO WHITAKER