 Attached to the cameras in the studio and in the candidate's field of view are the timing lights. When the lights show yellow, there are 15 seconds left in a candidate's answer or response. When the lights flash red, there are five seconds left. And when the display is solid red, the time is up. At that point, the candidate's microphone will be turned off, and the other candidate will have their microphone turned on. My colleague, Victor Blackwell, has more on that.