Col. John Atkinson, commanding officer of Headquarters and Service Battalion, thanks Gunnery Sgt. Carlos Perez for donating at the Armed Services Blood Program blood drive held on Sept. 11, 2018. - Col. John Atkinson, commanding officer of Headquarters and Service Battalion, thanks Gunnery Sgt. Carlos Perez for donating at the Armed Services Blood Program blood drive held on Sept. 11, 2018.