Coast Guard Lt. Marie Castillo-Bletso, the chief of

Coast Guard Lt. Marie Castillo-Bletso, the chief of the Port Safety and Security Inspections branch at Coast Guard Sector Baltimore, explains the Transportation Worker Identification Credential program to a group of Argentinean coast guard representatives during an International Port Security Program visit at Sector Baltimore, Oct. 19, 2010. The visit included tours of local maritime facilities and opportunities to share information regarding the Coast Guard's role as ports, waterways and coastal security specialists. (U.S. Coast Guard photo by Petty Officer 3rd Class Robert Brazzell)