Senior Airman William Bailey, a military working dog handler and Joint Expeditionary Tasking Airman from the 732nd Air Expeditionary Group attached to the Army's 1st Cavalry, and Robby, his nine-year-old Belgian Malinois patrol, explosives detector dog, leave their mark in the sand after completing their daily obedience training here recently. Airman Bailey and Robby are deployed from the 4th Security Forces Squadron, Seymour Johnson Air Force Base, N.C. Airman Bailey is a native of Richmond, Va.