A pair of humpback whales are swimming in the Sacramento River about 50 miles upstream from San Francisco Bay.
Dr. Frances Gulland is with the Sausalito, Calif., -based Marine Mammal Center, which has specially trained crews to rescue distressed marine mammals. Guilland is concerned the whales may be lost and could be injured by a ship. She's trying to develop a plan to herd the whales back to sea.
Gulland talks to Alex Chadwick about what is being done to save the whales