V ice Chairman of the Joint Chiefs of Staff Adm. James Winnefeld Jr., left, observes the preparation for a mortar live-fire event aboard Marine Corps Base Quantico with Capt. Charles Broun, deputy director of the Infantry Officer Course, and Maj. George Flynn, director of IOC. - V ice Chairman of the Joint Chiefs of Staff Adm. James Winnefeld Jr., left, observes the preparation for a mortar live-fire event aboard Marine Corps Base Quantico with Capt. Charles Broun, deputy director of the Infantry Officer Course, and Maj. George Flynn, director of IOC.