Oral history interview with Alfred J. O'Donnell Jr. conducted by Kenneth "K. J." Evans on October 20, 1998 for the Las Vegas Review-Journal First 100 Oral History Project. In the interview, O'Donnell discusses his parents, his early life in Boston, Massachusetts, and his education at Northeastern University. He then talks about serving in World War II and his work with Dr. Herbert Grier and EG&G, formally known as Edgerton, Germeshausen, and Grier, Inc. O'Donnell recalls the corporation's creation, its function as a United States national defense contractor, and his experiences arming and performing final checks and connections for atomic bombs at the Nevada Test Site. He also discusses public opinions on atomic testing and the transition from atmospheric testing to underground testing.