 Dewey's widow, Nancy, married John Pierrepont in 1950.Dewey's nephew David Dewey Alger, a descendant of Michigan political scion Russell A. Alger, was killed in the 9/11 attacks on the World Trade Center.On August 10, 1944, Dewey parachuted into southern France as the leader of a 10-man team from the United States Office of Strategic Services (OSS).