United States Unmanned Aerial Vehicle Market Assessment, By Wing Type [Fixed Wing, Rotary Wing, Others], By Class [Micro/Mini UAVs, Tactical UAVs, Strategic UAVs, Others], By Application [Commercial, Defense, Civil, Others], By Mode of Operation [Remotely Operated, Semi-Autonomous, Fully Autonomous], By Maximum Take Off Weight [Less than 15 Kg, 15 to 50 Kg, More than 50 Kg], By Region, Opportunities and Forecast, 2017-2031F