National Museum of Nuclear Science & History
Alfred Pfanstiehl was a junior physicist at the Chicago Met Lab during the Manhattan Project. Pfanstiehl was a signatory of the Szilard Petition, an attempt to avert military use of the atomic bomb against Japan.
Bradley Jr. worked at the 200 West Area at Hanford during the Manhattan Project.
Leonard Pepkowitz (1915-2006) was an American chemist. Pepkowitz was born in Paterson, New Jersey. He earned a B.