The 43,000 tons of radioactive waste and soil came from a top-secret initiative: The Manhattan Project, which built the atomic bombs America dropped on Japan in 1945. In 1973, that waste ended up in an unlined landfill in Bridgeton, Missouri, a St. Louis suburb. Workers spread it to cover trash and construction debris. In 1990, the U.S. Environmental Protection Agency declared the West Lake Landfill one of the nation's most contaminated sites requiring cleanup. [In 2012], residents mobilized, spotlighting stories of children dying from cancer. And they pressed waste-management giant Republic Services, the dump's owner, to remove the radioactive waste. In refuting neighbors' complaints, Republic tapped an unlikely ally that U.S. corporations have leaned on for decades: a federal health agency set up to protect people from environmental hazards just like the West Lake dump. A 2015 report by that small bureaucracy, the Agency for Toxic Substances and Disease Registry (ATSDR) ... declared that the landfill posed no health risk to the community. Deborah Mitchell grew up ... less than a mile from the dump. She lost both parents to cancer and battled the disease herself. Dozens of neighbors have similar stories. Three cancer researchers told Reuters the number of cases in the neighborhood is worrisome. "You just feel like you're being gaslighted by your own government," Mitchell said of the ATSDR's role.