Former ABC News' chief national security correspondent.
Was at the Pentagon when a hijacked plane crashed into the building on September 11, 2001 attacks, but fled and kept reporting live from a nearby lawn.
Joined ABC News in 1979 as chief Pentagon correspondent, covering the Iran hostage crisis and the Soviet invasion of Afghanistan.
Was awarded an honorary doctorate by his alma mater, DePauw University, and had a master's degree from Columbia University's journalism school.
Received five national Emmy Awards for his participation in "World News Tonight" coverage of Sept. 11, 2001, ABC News' millennium coverage, and individual reporting on Ross Perot, the Persian Gulf War, and the Soviet military.