It's the 'stache, Cap!
Thanks to Ronald Salas for letting me post this great Iron Man panel he drew up. I gotta say, his website and comic art is awesome. And he really knows how to handle b&w art. It's hard to believe he's not drawing a book fulltime. I love this panel for all the little things -- like the tone he's put on and the expression on Cap's face.
Thanks again Ronald!