National Museum of Nuclear Science & History
Walter M. Longfelt was a laborer at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
John Chipman was an American engineer. Chipman was born in 1897 in Tallahassee, Florida. He received B.
Diana (Florence Ruth) Russell was a Manhattan Project veteran from the Hanford, Washington facility. Shortly after the end of the war, she started work reading the radiation exposure badges that all employees in the radioactive areas were required to wear.
