WASHINGTON (CNN) -- One of the Marines shown in a famous World War II photograph raising the U.S. flag on Iwo Jima was posthumously awarded a certificate of U.S. citizenship on Tuesday. Sgt. Michael Strank, who was born in Czechoslovakia and came to the United States when he was 3, derived U.S. citizenship when his father was naturalized in 1935. However, U.S. Citizenship and Immigration Services recently discovered that Strank never was given citizenship papers. At a ceremony Tuesday at the Marine Corps Memorial -- which depicts the flag-raising -- in Arlington, Virginia, a certificate of citizenship was presented to...