It’s been 23 years since America watched in horror as the Twin Towers fell on live TV. Nineteen al-Qaeda terrorists, hailing from Saudi Arabia, the United Arab Emirates, Egypt and Lebanon, hijacked four planes and killed 2,977 of us, shaking the nation to its core. America was suddenly, brutally awoken to the menace of those who hate our country and what we stand for. Heroes stood up: Todd Beamer and his fellows on Flight 93; firefighter Stephen Siller and his Brooklyn-...