Corporal Adrian Gonzalez, a field artillery cannoneer and a gun chief serving with Echo Battery, 2nd Battalion, 11th Marine Regiment, provides security against a simulated enemy attack during a live-fire training exercise here, April 3, 2013. Gonzalez, a 28-year-old-native of Los Angeles, said being a great field artillery cannoneer doesn't mean all you have to learn is artillery. He said he had to learn how to operate as an infantry rifleman as well.