Krissy Calvert, American Red Cross technician, questions U. S. Army Staff Sgt. Jason Panergo, 128th Aviation Brigade weapons instructor, before drawing blood at a blood drive held at Fort Eustis, Va., Oct. 15, 2014. The entire screening process and blood collection takes approximately one hour but the blood collection itself is only about 15 minutes. (U.S. Air Force photo by Staff Sgt. Teresa J. Cleveland/Released)