Marines with Marine Wing Support Squadron 271 take cover behind a protective blanket during breach training at Marine Corps Air Station Cherry Point’s demolition range, July 31, 2014. The Marines breached doors using various explosives such as oval charges and donut charges during the training. - Marines with Marine Wing Support Squadron 271 take cover behind a protective blanket during breach training at Marine Corps Air Station Cherry Point’s demolition range, July 31, 2014. The Marines breached doors using various explosives such as oval charges and donut charges during the training.