India and China were the top sources of radioactive goods shipped to the U.S. through 2008, according to the Department of Homeland Security. Bartley, a metallu

India and China were the top sources of radioactive goods shipped to the U.S. through 2008, according to the Department of Homeland Security. Bartley, a metallurgist who has tracked radioactive contamination since the early 1990s, said there’s no evidence the situation has improved.