Former New York City Mayor Rudy Giuliani said Sunday that the terrorist attacks of September 11, 2001, forced some positive changes in the U.S.

"I think it made us more realistic about the threat that we face," Giuliani said on CBS' "Face the Nation." "I think we have better intelligence today. I think spiritually we're stronger."

Giuliani said that if another terrorist attack should ever happen, the nation would find a similar sense of unity to the time following 9/11.

"If we got attacked again and it was the same kind of a situation where our freedom was in jeopardy, our future was in jeopardy, we'll forget about all these petty differences we have," he said. "It's like when you find out that somebody you love is ill or just died, all those little small things you're thinking about go away."



