PFC. Taylor Serrano, a student at National Geospatial Intelligence Agency in Springfield, Va., surveys landmarks on Marine Corps Base Quantico on Jan. 29, 2014. Serrano was performing this as a phase completion exercise as she nears her halfway point in becoming a Basic Geographic Intelligence Specialist. - PFC. Taylor Serrano, a student at National Geospatial Intelligence Agency in Springfield, Va., surveys landmarks on Marine Corps Base Quantico on Jan. 29, 2014. Serrano was performing this as a phase completion exercise as she nears her halfway point in becoming a Basic Geographic Intelligence Specialist.