The Aircraft
While the Global Hawk may look like a larger version of the Predator UAV, it’s a different aircraft with a different mission. Predators provide real-time surveillance and reporting of local target and maneuver info, and Global Hawks provide long-range intelligence. Think of the difference between an RF-4 and a U-2.
Global Hawks have set a couple of world records for UAVs, including altitude (65,000+ feet) and range (8214 miles). The range record was also notable as the first flight by a UAV non-stop across the Pacific, Edwards AFB to Australia.