27. 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.
[] September 2001 or later
[] August 1990 to August 2001 (including Persian Gulf War)
[] September 1980 to July 1990
[] May 1975 to August 1980
[] Vietnam era (August 1964 to April 1975)
[] March 1961 to July 1964
[] February 1955 to February 1961
[] Korean War (June 1950 to January 1955)
[] January 1947 to June 1950
[] World War II (December 1941 to December 1946)
[] November 1941 or earlier 28.