The PBS debate  is underway and my first thoughts  are the three introductions of the event only detracted from the amount time for the candidates to debate.  Tom Joyer, Tavis Smiley and Gov. Deval Patrick (D-Mass.) should have made their remarks brief.  The media room is full but not crowded, and the spin locations are clearly marked on a red carpert in the center of the room.  The absence of ground rules before starting could be disruptive as the debate continues.  In the first few minutes during the opening photo op with candiates, there was a clear level of discomfort from candidates with shouts for Obama from the audience.