The Air National Guard has sent a drone -- an actual MQ-9 Reaper and not a small hobbyist machine -- to help find a missing schoolteacher in San Francisco. He was last seen riding his blue motorcycle on July 17th. The drone was deployed on Wednesday morning and flew for a few hours, scouring the El Dorado National Forest using infrared and its high-tech cameras to look for any sign of the 46-year-old high school instructor, Edward Cavanaugh. While its efforts didn't pay off in the end (the teacher hasn't been found yet), it's a nice reminder that drones can also be used for good. It's easy to forget that when you often hear bad things, such as how they hindered aerial firefighting efforts in the same state, how big companies want to use them to inject spyware and how the government uses them for surveillance.