He actually made this speech yesterday at the Shanksville Pennsylvania Memorial, in honor of those brave airline passengers who overpowered the Muslim hijackers and in doing so probably saved the Capitol on 9/11. They lost their lives in the attempt when the plane crashed into a field in Cranksville. President Bush spoke first, and it is said to be a very moving speech as well (I haven't heard it yet).
But I wanted to bring your attention to Clinton's speech, very likely the best one of his life, as he compares the heroic passengers, all private citizens, to the Spartan Army of Thermopylae, and to the heroes of The Alamo. Men who knew they were going to die, but who willingly sacrificed themselves for the sake of their loved ones, and their country.
The heroes here did the same thing with very little time to prepare, and Clinton expresses his hopes that 2500 years from now, people will remember them as well. Very moving.