Bob Dubois, a rider coach for the Marine Corps Motorcycle Safety Program, gives advice to Cpl. Caitlin N. Liberson, a line mechanic out of New River’s Marine Light Attack Helicopter Squadron 167, at the Advanced Rider Track Day at Marine Corps Auxiliary Landing Field Bogue Aug. 14. - Bob Dubois, a rider coach for the Marine Corps Motorcycle Safety Program, gives advice to Cpl. Caitlin N. Liberson, a line mechanic out of New River’s Marine Light Attack Helicopter Squadron 167, at the Advanced Rider Track Day at Marine Corps Auxiliary Landing Field Bogue Aug. 14.