Senior Airman David Lopez-Rivera, 22nd Aircraft Maintenance Squadron guidance and control systems apprentice, is recognized by Col. Mark Baran, 22nd Air Refueling Wing vice commander, for earning a score of 95 percent on his Career Development Course Feb. 5, 2019, at McConnell Air Force Base, Kan. CDCs help enlisted personnel complete the specialty knowledge portion of on-the-job training for their specific career fields.