1.   Rizzo said some of the plaintiffs said they heard a faint siren in the distance, and called police headquarters, but were told not to worry.

2.   Outside, silence fell over Tiananmen Square, and faint sirens could be heard in the distance.

3.   Outside, silence fell over Tiananmen Square, which was cloaked in a wintry mist, and faint sirens could be heard in the distance.

4.   Silence fell over Tiananmen Square, and faint sirens could be heard in the distance.