The location-routing problem (LRP) of unmanned aerial vehicles (UAV) in border patrol for Intelligence. Surveillance. and Reconnaissance is investigated. where the locations of UAV base stations and the UAV flying routes for visiting the targets in border area are jointly optimized. https://www.roneverhart.com/NeOn-Zero-Lefty-M390-BLADE-TITANIUM-HANDLE-MRBS-p11472/