 After brief stints with "Investment Dealers Digest" (1949–50) and "Time" (1950), he completed a second Army tour as an intelligence officer during the Korean War.Following the conflict, he returned to "Time", where he was promoted to associate editor (1956-1961) and thence senior editor of the United States and world business sections (1961-1963).Thereafter, Christopher held a variety of positions at "Newsweek" over the next sixteen years, including foreign editor (1963-1969), executive editor (1969-1972), founding editor of the periodical's international edition (1972-1977) and contributing editor (1977-1979).