Lt. Col. retired Mark Schaible was the keynote speaker Sept. 13 at the 2013 Air Force Ball on Grand Forks Air Force Base, N.D. Schaible spoke about how he overcame a rare blood disease he contracted during his time as a test pilot in the U.S. Air Force. Schaible speaks to groups everywhere about his experiences to give hope to others in unfortunate medical situations. (U.S. Air Force photo/Airman 1st Class Zachiah A. Roberson)
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