<p>LONDON -- Last Wednesday, I was privileged to speak at a ceremony at which the George C. Marshall Foundation Award was given to my friend, Colin Powell. It was a wonderful, all-American occasion (us Brits notwithstanding). Beyond its specific task of honoring a local hero, it was, to me, a celebration of the best of America and its international role. Marshall's contribution to the building of a free Europe was at least as great as Winston Churchill's, Jean Monnet's or Robert Schumann's. Pervading the event was the recognition that what flows from the U.S. -- which, with 5% of the world's population produces 25% of the world's wealth, and spends more on defense than the next nine nations combined -- is not raw power but an awareness of responsibility.</p>