A Tactical Meteorological Observing System takes weather readings during exercise COPE NORTH 18 at Tinian, U.S. Commonwealth of the Northern Marianas Islands, Feb. 21. COPE NORTH is a model opportunity to practice humanitarian assistance/disaster relief in order to increase interoperability and readiness between the U.S. Air Force and allied forces. (U.S. Air Force photo by Airman 1st Class Christopher Quail)