U.S. Marine Corps Pfc. Alfonso Padilla, guides a local elementary school child and his mother at a crosswalk July 18, 2019. Crossing guard duty is one of the multiple tasks conducted by Marine volunteers on Okinawa. - U.S. Marine Corps Pfc. Alfonso Padilla, guides a local elementary school child and his mother at a crosswalk July 18, 2019. Crossing guard duty is one of the multiple tasks conducted by Marine volunteers on Okinawa.