Security, security, security. X-ray machines, police everywhere, police vans cars etc. If I had held up a sign at Tiananmen saying Free Tibet, I would have been arrested inside of 30 seconds. On the light posts in the square there were 3 cameras per post, all pointing in different directions.
Saw the lowering of the national flag, lots of soldiers looking official. Within minutes of the flag coming down, police directed people off the square with angry yells and gestures. I would not like to get these guys pissed off! Smiled at one of the police, he did not smile back!