Steelworker 2nd Class Bud Gabbert, assigned to the 20th Seabee Readiness Group, instructs Builder 2nd Class Jeremiah Lipetzky, assigned to Naval Mobile Construction Battalion 74, the proper way to fire the anti tank rocket launcher during a weapons training exercise at Camp Shelby, Miss Jan 13, 2012. The AT-4 is a shoulder-launched lightweight anti-armor weapon.