Modern European History, Military History, Diplomatic History
History of science and technology; the US space program; professional ethics, professional communication, and the phenomena of technological disasters; whistleblowing
US History, Gender and Race History, History of Science and Technology (HOST), History of Medicine
United States Post-1945, American Diplomatic History, Mexican-American Foreign Relations.
20th Century American political history, particularly post-1945 American political developments, politicians, campaigns, and the history of modern conservatism.
20th Century United States Environmental History