Staff Sgt. Sean O'Leary, Wounded Warrior Battalion West: Twentynine Palms Detachment, plays bingo with 2nd graders at Onaga Elementary Nov. 14, 2013. - Staff Sgt. Sean O'Leary, Wounded Warrior Battalion West: Twentynine Palms Detachment, plays bingo with 2nd graders at Onaga Elementary Nov. 14, 2013.