President Obama and former Mayor Rudy Giuliani meet with firefighters and first responders in New York City. (Charles Dharapak/AP)

“This is a symbolic site of the extraordinary sacrifice that was made on that terrible day almost 10 years ago,” the president said. “What happened on Sunday, because of the courage of our military and the outstanding work of our intelligence, sent a message around the world, but also sent a message here back home that when we say we will never forget, we mean what we say.”

Watch the president’s speech below: