Speed enforcement cameras don't just snap pictures of speeders; this one in Arizona was shooting moving video and captured a dramatic head-on collision between a school bus and a car that appears to be in the wrong lane.
It's a scary scene, but apparently no one on the bus suffered major injuries. The three people in the car did not survive.
Here's what else we see in the video: It looks like the bus driver tried to avoid the oncoming car, and flashing lights of police showed up within a minute of the episode.
Videos like this will be a big help for investigators piecing such episodes together, and the bus driver is probably glad that there's evidence showing the accident, far as well could tell, was not his/her fault.