CRAWFORD, Texas (Reuters) - At least one American tourist was killed and another seriously injured in the earthquake that claimed tens of thousands of lives in Iran, the State Department said on Saturday. The injured American has been hospitalized in Tehran, State Department spokesman Lou Fintor said. "The injuries are serious but do not appear to be life threatening," Fintor told reporters traveling with President Bush to his ranch in Texas. The Swiss Embassy is aiding the American in the absence of U.S. diplomatic ties with Iran. Relatives of the two Americans have been notified, but the State Department has...