makes us human and the battle for the soul of america, unity is greatest strength. unity doesn't mean we have to believe the same thing. we must have a fund mental respect and faith in each other and in this nation. >> clearly, we lost a lot of unity. when you look back on these 20 years, how did that happen? >> well, the good news is we reacted to 9/11. we built a homeland security department, and we did tsa and increased at airports and i feel we have better port security. we're able to monitor terrorist groups much better than we did 20 years ago. it's gotten ugly and heinous within. part of it is american xenophobia and nativism.