MIAMI -- A passenger who claimed to have a bomb in a carry-on bag was shot and killed by a federal air marshal today on a jetway connected to an American Airlines plane that had arrived from Colombia, officials said. Cable News Network reported the deceased is a 44-year-old U.S. citizen. A law enforcement official who spoke on condition of anonymity confirmed shots were fired from the marshal's gun. The airline said the confrontation was on a jetway. A second federal law enforcement official, who also spoke only on condition of anonymity because the investigation still was unfolding, said the...