Flying in Death Valley with the Zephyr and a HobbyKing RadJet. (verbal permission from a ranger on site! normally R/C is banned in Death Valley be sure you get permission!). Death Valley is an amazing place for FPV. The salt flats and surrounding area are pretty challenging RF-wise. We managed to reach 5km, then the video link started to deteriorate. R/C was still within a reasonable safety margin but surprisingly weak too.