Have any of you been to the Global Entry enrollment office at PHL? Can you fill me in on how to get there -- and more importantly, how easy it is to get to? Is it inside or outside security? The instructions describe it as being on the 3rd floor of the international arrivals hall. But they're not very clear on how to get there, and don't say anything about security. I'm sure I can find it, but I'm wondering how far in advance I'll need to arrive. And I'm not flying the same day as my interview, so I'm hoping that the office is outside security. Thanks in advance for your help.