Declassified US Navy Dolphins

This program is among the first look inside the United States Navy's Marine Mammals Facilities - classified top secret for 30 years - to meet the dedicated marine biologists who work with the playful and intelligent U.S. Navy Dolphins. Rare footage of marine mammals engaging in mine-sweeping activities in Vietnam is contrasted with today's peacetime mission for these quick-witted dolphins. On location in Hawaii and San Diego.

• documentary