Maintaining America's waterways, all in a days work III

Seaman Cristina Santiago, a crewmember aboard the Coast Guard Cutter William Tate, intstalls light bulbs into a lantern Wednesday, June 25, 2008, in the Delaware River near Philadelphia. The lanterns are installed aboard navigational buoys, making them visible by mariners at night and during times of low visibility. (U.S. Coast Guard photo/Petty Officer Christopher D. McLaughlin)