Associated Press
In this photo taken on May 28, 2012, Princeton University Prof. Frank von Hippel speaks during an interview with The Associated Press in Tokyo. Last year's tsunami crisis left Japan's nuclear future in doubt and its reactors idled, rendering its huge stockpile of plutonium useless for now. So, the nuclear industry's plan to produce even more this year has raised a red flag. "It's crazy," said Princeton University professor Frank von Hippel, a leading authority on non-proliferation issues and a former assistant director for national security in the White House Office of Science and Technology. "There is absolutely no reason to do that." Von Hippel stressed that only two other countries reprocess on a large scale: France and Britain, and Britain has decided to give it up. Japan's civilian-use plutonium stockpile is already the fifth-largest in the world, and it has enough plutonium to make about 5,000 simple nuclear warheads, although it does not manufacture them. (AP Photo/Koji Sasahara)

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