Drones are highly sophisticated killing machines, even not detected by radar ,but not hard or impossible to kill these unmanned combat air vehicle by China, Russia, Pakistan, Even Iran hunted down a number of US drones have captured a much bigger and more sophisticated CIA stealth drone, an RQ-170 Sentinel. Can be easily hunted what ever size and type they are but if there are no back door political deals of corrupt Pakistani politicians.The world most advanced fastest latest us x47b can fly from air craft carrier and even used for refueling and can use all kind of weapons from invisible location but cant resist against carrier killing weapons the one with china and may be Russia but china already got best anti carrier and anti x47b weapons more advanced stealth is coming soon, along UCAV ,china already have similar to US laser weapon capable of shooting unmanned aerial vehicles from a range of just less than 3 miles and capability of Drone detection and jamming signals to destroy them. China have technology which figures out how to intercept satellite signals to specific equipment and Predator used unencrypted data.The laser's beam can shoot down a drone traveling as fast as 600 miles per hour tracking the drones with sensors used and destroying the aircraft using a high-powered, fiber-optic laser capability to detect, track, engage and defeat dynamic targets at tactically significant ranges. Electromagnetic Radiation Laser saturation of optics/CCD sensors Laser burning critical components Microwave disabling critical electronic,s GPS jamming ,Decoy emitters of microwave and IR radiation, Kinetic energy systems Confusion, logistical and information warfare techniques, High flying Party balloons with aluminum foil reflectors, Spoofing fake radio signals to take over control of drone Intercepting radio Attacking drone energy supply, fuel supply, battery supply route lines, Small arms weapons Small-Medium SAM systems Jamming of drone communication systems.