It’s a piece of America’s history often brushed aside as less significant or too painful to remember. After the Dec. 7, 1941, bombing of Pearl Harbor, Japanese-American citizens living along the West Coast were rounded up and sent to “War Relocation Camps” in remote areas of the country. Many years later, the U.S. government realized these people never really posed a threat to national security. Go figure. Life in the camps was no vacation, as depicted in a traveling exhibition of 50 images by renowned photographer Ansel Adams, who in 1943-44 captured scenes from one of the largest internment camps, in Manzanar, Calif. Adams was well-known for his nature and landscape photography and belief in environmental conservation.