After returning to the U.S. after a recent trip to China, I discovered that those sites are STILL blocked on my MacBook. They must have planted something in my hard drive. Suggestions? I don't see anything unusual in my cookie file, but I know there are some cookies buried out of sight, the kind that keep track of where you browse. I suspect that is what they used over there, but I am just guessing. Whatever they did, it did not stay in China when I went home.