BUOY BOUNDARY U.S. Coast Guard Seamen Eric Dahl and Adam Pierce position a buoy along the Allegheny River in Pittsburgh, Pa., Sept. 24, 2009. The crew of USCGC Osage is positioning the buoys to give mariners a clear picture of the security boundary. SHARE: Download: Full Size (0.05 MB) Credit: VIRIN: 864240-K-ICC53-468.jpg Photo Gallery