On 9/11, the Coast Guard put out a radio call in New York Harbor. All available boats, help evacuate southern Manhattan.
Half a million rescued that day, at America's Dunkirk. Wow.
I believe that everyone has a little hero in them. You look in there, it'll come out.
UPDATE 14 October 2011 00:37: Coast Guard member spit on my Occupy Boston protesters. Stay classy!