Seaman Christopher Reed and Seaman Nathaniel Bear from the Coast Guard Cutter Cheyenne push a river buoy overboard during a training exercise in St. Louis, Feb. 15, 2013. The Cheyenne services buoys and day beacons along the Mississippi, Missouri and Kaskaskia rivers. (U.S. Coast Guard photo by Petty Officer 2nd Class Ayla Kelley)