Corporal Francisco Arreola (left), field wireman, and Sgt. Christopher Bonner, assistant communications chief, both with Battery B, Battalion Landing Team 3/5, 15th Marine Expeditionary Unit, watch as the USS Rushmore leaves San Diego, to begin the 15th MEU’s Certification Exercise, Aug. 15. The CERTEX is the MEU’s final training exercise before deploying later this year. The two-week training evolution evaluates the unit’s ability to complete missions it may face while forward deployed. Arreola, 22, is from Center Point, Texas, and Bonner, 26, is from Boynton Beach, Fla.