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Topic: environmental clean up

FILE - In this July 9, 2014, file photo, a sign informs visitors of prohibited items on the Hanford Nuclear Reservation near Richland, Wash. Officials for the Hanford Nuclear Reservation are trying to determine if a second giant underground tank containing radioactive waste from the production of plutonium for nuclear weapons is leaking, the U.S. Department of Energy revealed. (AP Photo/Ted S. Warren, File) (AP)

The Cold War's toxic legacy

William J. Kinsella - The Conversation
(AP)

Pentagon downplays environmental threat

Abrahm Lustgarten - ProPublica
(AP)

Cleaning up toxic waste

Lindsey Dillon - Grist