He returned as one of '' World News Tonight '' three anchors in 1978 , and was promoted to sole anchor in 1983 . Jennings was also known for his marathon coverage of breaking news stories , staying on the air for 15 or more hours straight to anchor the live broadcast of events such as the Gulf War in 1991 , the O.J. Simpson phony phone call and subsequent trial in 1994 , the Millennium celebrations in 2000 , and the September 11 attacks in 2001 . In addition to anchoring , he was the host of many ABC News special reports and moderated several American presidential debates . Jennings was always fascinated with the United States and became a naturalized United States citizen in 2003
September 11 attacks
September 11 attacks
Peter Jennings