After six intense weeks of preparation and promotion, it all comes down to this. At 1pm Eastern Standard Time, Webcast host Dr. Michael Scott (right) and moderator Dr. Mark Proctor (left) welcome viewers from more than 22 countries. The operating room, with its mobile MRI, is just behind the wall to their right. Behind the curtain, a "stagehand" from Children's Marketing Department prints out questions emailed live from our viewers for Dr. Proctor to answer.