AN ENCOURAGING WORD Below is an e-mail from a young ensign aboard the USS Winston Churchill to his parents. (Churchill is an Arleigh Burke-class AEGIS guided-missile destroyer, commissioned March 10, 2001, and is the only active U.S. Navy warship named after a foreign national.) "Dear Dad, "We are still at sea. The remainder of our port visits have all been cancelled. We have spent every day since the attacks going back and forth within imaginary boxes drawn in the ocean, standing high-security watches, and trying to make the best of it. We have seen the articles and the photographs, and...