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Manhattan Project Scientist Dies

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Samuel Isaac Weissman, a professor and chemist who helped develop the first atomic bomb as part of the Manhattan Project, has died, his wife said Friday. He was 94.

Weissman died Tuesday in St. Louis. His wife, Jane Loevinger, said a cause of death was not known.

Weissman's work with lasers and resonant energy transfer methods at the University of California at Berkeley was cut short when he became one of the first scientists to arrive in Los Alamos, N.M., to work on the Manhattan Project during World War II.

"He spoke of the Los Alamos work with mixed feelings," said his son, Michael Weissman, professor of physics at the University of Illinois. "He often mentioned his Grandpa Benjamin's reaction after the war: 'Sam, the world isn't ready for this thing you've built.'"

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