For several years now NBC has meticulously planned all the details for its coverage of the many sports events at the Summer Olympics in China.

But with the Games only 19 days away, many at the network are concerned about how they will be permitted to cover any unscheduled events, like political protests or government crackdowns — or whether the Chinese government will allow them to cover such things at all.

One of the most common hypothetical questions NBC officials have bandied about involves the opening ceremonies on Aug. 8.

Hundreds of athletes will parade into a stadium in front of world leaders, including President Bush, and a huge global television audience. If an athlete holds a protest sign or waves a Tibetan flag, how will the Chinese hosts react? Will the television networks show the scene? How will the Chinese handle the media for the rest of the Games?

The stakes are high for both the network, which paid $900 million for broadcast rights for the Olympics, and the...