KUWAIT The two main American schools in Kuwait have decided to close for about six weeks because of growing tensions in the Gulf, school officials said Monday in the first substantive sign of war fears among Americans here. The American School of Kuwait and the American International School will shut their doors on Friday until March 22. The decision comes two weeks after suspected Muslim extremists shot and killed a businessman who was contracted to the U.S. military in Kuwait. "There's a lot of tension and we can't live with tension," the school's owner, Wael Abdul Ghafour, said. "It's just...