WWW.ACEPIXS.COM . . . . . ....January 17 2008, New York City....Actors Bruce Willis and Sylvester Stallone arriving at the 'Late Show with David Letterman' at the Ed Sullian Theatre on an 'American Chopper' motorcycle....Please byline: KRISTIN CALLAHAN - ACEPIXS.COM..... *** ***..Ace Pictures, Inc: ..te: (646) 769 0430..e-mail: info@acepixs.com..web: http://www.acepixs.com