All Groups: (1940s background): PBS: The War series. Section on civil rights during WWII
This is a little earlier than the period you're studying (1940s), but this site discusses various groups that did not have equal rights during WWII, their status, and how that affected their feelings about supporting the war. This affected the way that the civil rights movement developed later on.
The Society of Environmental Journalists is a group of over 1,500 professional journalists whose mission is to "strengthen the quality, reach and viability of journalism across all media to advance public understanding of environmental issues."
Japanese American and African American Civil Rights
An interesting article from a public radio broadcaster about the history of both racism and cooperation between the African-American and Japanese-American communities since WWII, as both groups faced racism and discrimination.
This PBS site contains some good information about what happened after Japanese internment, including health effects on the people who were imprisoned in the camps, and the Civil Liberties Act of 1988, which attempted to apologize for and make financial reparations for internment to Japanese-Americans.