NAIROBI, Kenya (AP) — By the time U.S. military forces left Somalia in 1994 after entering the lawless nation more than a year earlier to stop a famine, 44 Army soldiers, Marines and airmen had been killed and dozens more wounded. Thus ended America's last large-scale military intervention in Africa. But the U.S. has come back, using special forces advisers, drones and tens of millions of dollars in military aid to combat a growing and multifaceted security threat. This time the United States is playing a less obtrusive role but is focusing once again on Somalia. While putting few U.S....