Apparently, though, the new routing path slipped beyond Pakistan's borders. Some major ISPs, most noticeably Asia's PCCW, picked up the reroute, and from there a domino effect of sorts sent it worldwide (hit up Ars Technica for the nitty gritty). Every time a user in, say, the U.K. went to www.youtube.com, he'd be routed along the same path Pakistan had put into effect for censoring purposes. The result? A blank page.