“Sometimes, our expectations of being all-knowing is somewhat unrealistic. At the end of the day, there are people out there who mean harm to us, are thinking about doing harm to us and motivated to do it, and we don't know what that is.”

American political commentator and retired general

Jack Keane is an American political commentator and retired Army general. He served from 1999 to 2003 as the 29th vice chief of staff of the United States Army, and in 2003 he briefly served as acting chief of staff. He is also a national security analyst, especially on Fox News, where he appears regularly on military and defense issues. Beyond broadcast commentary, he chairs the Institute for the Study of War and AM General, roles that reflect his continued focus on national security and strategy.