Intelligence SPECIALIST Second Class (IS2), Peter Fallgatter and IS3, Lisa Gano, USN, Seventh Fleet, Naval Air Station Fort Worth, Texas re-enforce a tent with sand bags at "Tent City" Osan AB, Korea during Exercise Ulchi Focus Lens 2001. Exercise Ulchi Focus Lens in an annual computer modeling and simulation command post exercise designed to test, evaluate and improve combined and joint communications, coordination, procedures, plans and systems needed to conduct contingency operations by the Republic of Korea and the United States