Jimmy Page has a busy day in the Big Apple this week. On Thursday (11/6), the Led Zeppelin veteran will make a book signing appearance, conduct a Q&A session for a sold-out gathering of Zep fans and appear as a feature guest on the David Letterman Show. Knowing Dave, it's unlikely the host will fail to ask the guitarist whether the remaining three members of the legendary band will reunite for a concert unless Page or his handlers agreed to the appearance only if that question was not asked.