FORT NORFOLK, Va. -- Contractors re-roof the carpenter's shop and storeroom here Feb. 10, 2012. The Norfolk District, U.S. Army Corps of Engineers, which is headquartered at the fort, is charged with maintaining and preserving Fort Norfolk, one of the last remaining of 19 harbor-front forts authorized in 1794 by President George Washington. (U.S. Army photo/Kerry Solan)