OMAHA, Nebraska, Oct. 31 -- Creighton University issued the following news release: Whatever else may have been said about the country over the past three years, whatever trials the United States might face today, there's one thing to which a pair of former U.S. Secretaries of State attested Tuesday night in front of nearly 2,500 attendees at Creighton University. "There is no substitute for the United States of America," said retired Army Gen. Colin Powell, who served as the head of the State more PR