Kenneth and Nancy Walker unveil the Walker Hall plaque with the help of Brig. Gen. Daniel D. Yoo, commanding general, Marine Corps Recruit Depot San Diego and Western Recruiting Region at the Walker Hall Dedication Ceremony May 10 aboard MCRD San Diego. Walker Hall is a sports-medicine complex named after the fallen Marine, Staff Sgt. Allan K. Walker, who served as a drill instructor aboard the depot. Walker was killed in action April 6, 2004 in support of Operation Iraqi Freedom. - Kenneth and Nancy Walker unveil the Walker Hall plaque with the help of Brig. Gen. Daniel D. Yoo, commanding general, Marine Corps Recruit Depot San Diego and Western Recruiting Region at the Walker Hall Dedication Ceremony May 10 aboard MCRD San Diego. Walker Hall is a sports-medicine complex named after the fallen Marine, Staff Sgt. Allan K. Walker, who served as a drill instructor aboard the depot. Walker was killed in action April 6, 2004 in support of Operation Iraqi Freedom.