U.S. military personnel carry an injured Acehnese man from a helicopter from Aceh's tsunami-hit west coast. U.S. military personnel carry an injured Acehnese man from a helicopter from Aceh's tsunami-hit west coast at Banda Aceh's airport on the Indonesian island of Sumatra January 6, 2005. World leaders tried to put $4 billion in aid pledged for tsunami survivors to work on Thursday, the urgency of their task conveyed in a chilling warning that the death toll could double without quick action to prevent disease. REUTERS/Yusuf Ahmad