They help the companies understand and deal more efficiently with employees and customers from diverse cultures and subcultures. There have even been anthropologists working in the White House and U.S. Congress studying the overall operations and personal interactions. In recent years, some cultural anthropologists have worked for the U.S. military and NATO in Afghanistan to help them better understand the cultural realities of the peoples of that region. A few cultural anthropologists have been hired by Native American tribes and other indigenous groups to help them with community development and to advise them in their interactions with the outside world.