$20,000 mail drone takes flight -- and hits a wall
 

Want to know why mail drones aren't ready for prime time? Russia can tell you. The Siberian town of Ulan-Ude was expecting to beam with pride as organizer Rudron/Expeditor 3M tested a postal drone in the area for the first time, but they left red-fac...

https://www.engadget.com/2018/04/04/...l-drone-crash/