Guilty. Guilty. Guilty. (Not to Drone On)

A third man goes down for using a drone in Yellowstone National Park. Donald Criswell of Molalla, Oregon, was charged with violating the National Park Service's ban on unmanned aircrafts. He allegedly flew over the crowded Midway Geyser Basin and close to bison in August. On Thursday, he pleaded guilty to the charge of violating a closure and was fined $1,000.

In September, Theodorus Van Vliet of the Netherlands pleaded guilty to controlling an unmanned aircraft that crashed into Grand Prismatic Spring.

Andreas Meissner of Germany also pleaded guilty in September to charges from operating a drone, which crashed into Yellowstone Lake in July.

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