A U.S. military regulation requires a medical doctor to be present during any flight into a battle area. Air Supply Services, a private company, operating in a support of American military forces, left for a battle zone in Iraq without the required medical doctor on board. During the flight, the co-pilot suffered a massive heart attack and was dead before any medical care could be given. Is Air Supply Services liable to the family of the co-pilot? Please explain more details under a law and provide different conditions.