In 1966 Tuohy joined the "Los Angeles Times" as the Saigon Bureau Chief. In 1969 Tuohy won the Pulitzer Prize for International Reporting for his Vietnam War correspondence the previous year. Tuohy had a lengthy career as a foreign correspondent. He served as Beirut Bureau Chief from 1968 to 1973, Rome Bureau Chief from 1973 to 1977, London Bureau Chief from 1977 to 1985, Bonn Bureau Chief from 1985 to 1990 and European Security Correspondent from 1990 to 1995. In addition to postings as bureau chief, he covered the Fall of Saigon, the Fall of the Berlin Wall, The Troubles of Northern Ireland, and the first Gulf War.