I attended a fairly large 4th of July celebration this year. It was truly fantastic. It is always amazing to witness the greatest experiment in freedom and liberty celebrated openly and without limits on the freedom of speech protected by that liberty. There were various groups exercising their free speech: abortion opponents had large photos of sliced up bloody fetuses, the teachers union had a booth pushing their union (the NEA) as the savior of children, the tea party had a stage and were giving speeches and awards to local activists. It was dynamic and never ceases to amaze me the vast swath of interests who utilize the freedom of speech.
During the celebration, I witnessed a very young adult, maybe in his late teens or early twenties, with a T-shirt emblazoned with the picture of Che Guevara.