Gibbs on Sykes: 9/11 is not 'comedy' By: Alexander Burns May 11, 2009 02:01 PM EST In his daily briefing Monday, Robert Gibbs distanced the president from comedian Wanda Sykes’ joke comparing Rush Limbaugh to a 9/11 hijacker at the White House Correspondents’ Association Dinner. "I don't know how the guests get booked,” Gibbs said, adding that he hadn’t “talked specifically” with Obama about Sykes’ crack. “I think there are a lot of topics that are better left for serious reflection rather than comedy. I think there's no doubt 9/11 is part of that,” Gibbs continued.