Leaders in a St. Louis suburb are urgently calling on top Obama administration officials to quickly clean up a landfill with radioactive waste that they believe could catch fire. The Environmental Protection Agency (EPA) has been working for 25 years on the West Lake Landfill in Bridgeton, Mo., which has housed barium sulfate waste from the Manhattan Project since the 1970s. The EPA is still studying the site and considering a wide range of actions to contain the radioactive material under its Superfund program for cleaning severe environmental contamination. But with an underground, smoldering fire in an adjacent landfill, residents...