 The US military recently employed UH-60 Black Hawk helicopters to provide air ambulance service during the Iraq War to military personnel and civilians.The use of military aircraft as battlefield ambulances continues to grow and develop today in a variety of countries, as does the use of fixed-wing aircraft for long-distance travel, including repatriation of the wounded.Currently, a NATO working group is investigating unpiloted aerial vehicles (UAVs) for casualty evacuation.