National Museum of Nuclear Science & History
Petersen worked in 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.
Harold Hoover was a member of the Special Engineer Detachment during the Manhattan Project. He worked as a filter foreman at the Y-12 Plant, but his real job was in counterintelligence, to ensure no sabotage occurred.
Jack Rose was a machinist and armorer in the Special Engineering Detachment (SED) assigned to the 509th Composite Group in Wendover, Utah.
