Thomas Donnelly, a defense and security policy analyst, is the codirector of the Marilyn Ware Center for Security Studies at the American Enterprise Institute. He is the author, coauthor, and editor of numerous articles, essays, and books, including Operation Just Cause: The Storming of Panama and Clash of Chariots: A History of Armored Warfare. He is currently at work on Empire of Liberty: The Origins of American Strategic Culture. From 1995 to 1999, he was policy group director for the House Committee on Armed Services. Donnelly also served as a member of the US-China Economic and Security Review Commission and is a former editor of Armed Forces Journal, Army Times, and Defense News.