Okinawans work to preserve history of World War II battle

The Battle of Okinawa in 1945 was one of the bloodiest of World War II. More than 200,000 people were killed during the three months of fighting, more than half of them civilians. Okinawans were victims not only to American artillery bombing, but also from the very people meant to be protecting them - Japanese forces. But that history, of the role the Japanese military played in Okinawan suffering, is getting left out of textbooks. Rebecca Rosman reports from Okinawa on some people who are trying to preserve the memory of what actually happened.