ALEXANDRIA, Va. - Petty Officer 1st Class Joshua Teeter, a member of Aids to Navigation Team Milford Haven, Va., steadies the seasonal replacement buoy as it is lowered into the Potomac River near the Woodrow Wilson Memorial Bridge, Dec. 13, 2011. The replacement is put in the river to mark the spot of the Chesapeake Bay Interpretive Buoy System buoy during the winter. U.S. Coast Guard photo by Petty Officer 3rd Class Jonathan Lindberg.