20.b. When did this person serve on active duty in the U.S. Armed Forces? Mark [X] a box for each period in which this person served.
[] August 1990 to March 1995 (including Persian Gulf War)
[] September 1980 to July 1990
[] May 1975 to August 1980
[] Vietnam era (August 1964-April 1975)
[] February 1955 to July 1964
[] Korean conflict (June 1950-January 1955)
[] World War II (September 1940-July 1947)
[] Some other time