Nuclear Museum Logo
Nuclear Museum Logo

National Museum of Nuclear Science & History

Nancy Greenewalt Frederick is the oldest daughter of Crawford Greenewalt, a chemical engineer who worked on the Manhattan Project and later become president of the DuPont Company. 

Related Profiles

Ernest Tremmel

Washington, DC

Ernest (Ernie) Tremmel was born on September 20, 1916 in Wisconsin. He graduated from the University of Wisconsin-Madison with a B.

Virginia Ballard

Hanford, WA

Virginia Ballard was born in Charleston, West Virginia. Her parents immigrated to the United States from Scotland.

Robert Howes Jr.

Los Alamos, NM

Robert I. Howes Jr. is an American physicist. He was born in Santa Fe, New Mexico in 1941, and was less than two years old when his father Robert Ingersoll Howes joined the Manhattan Project at Los Alamos.

Dimas Chavez

Los Alamos, NM

Dimas Chavez was a young child when he moved to Los Alamos with his family in August 1943. Chavez’s father, Trinidad, joined the Zia Company at Los Alamos, where he helped construct and maintain the laboratories and facilities there.