A 25-ft. Defender-class safe boat from Coast Guard Station Little Creek maintains a security zone around the USS John F. Kennedy (CV-67) as it is towed into the Port of Hampton Roads July 31, 2007. The decommissioned carrier will be moored temporarily at Naval Operating Base Norfolk before being towed to its new permanent home in Philadelphia. A 500-foot security buffer is maintained by Coast Guard vessels around naval vessels as they enter and exit port. (U.S. Coast Guard Photo by PA2 John D. Miller)