With five helicopters including four German heavy-lift CH-53 Stallions, and one medevac chopper from Luxembourg , NATO's air operation has delivered tons of aid to remote mountain villages while evacuating hundreds of sick and injured people.Where dams are built, their management too will have to be sustainable, with water releases and impoundments attuned to the requirements of the natural river system and downstream human beneficiaries of the river ecosystem, such as fishing communities, floodplain farmers and the users of wetlands.