Why did the tuskegee airmen have to retake their exam

they showed that African Americans could fight as well as white troops.

Explanation:

The Tuskegee Airmen were a group of African-American military pilots, both fighter and bomber, who fought in World War II. They were the first African-American soldiers to complete their courses and join the Army Air Force, before the Tuskegee Airmen, no African-American had been a U.S. military pilot. The success of the Tuskegee Airmen proved to the American public that African-Americans,  when given the opportunity, could become effective military leaders and pilots.

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