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Subj:.....Global Hawk (S536c) 
          From: darrell94590 on 4/25/2007
The Global Hawk (Tier II+) High-Altitude, Long-Endurance Unmanned Aerial Vehicle (HAE UAV) program is an Advanced Concept Technology Demonstration (ACTD) designed to satisfy the Defense Airborne Reconnaissance Office's (DARO) goal of providing extended reconnaissance capability to the Joint
Force commander.
Photo from FAS.org
Extended reconnaissance has been defined by the Director, DARO, MGen Kenneth Israel, as "the ability to supply responsive and sustained data from anywhere within enemy territory, day or night, regardless of weather, as the needs of the warfighter dictate." Two complementary HAE UAV systems are being developed under this program; a conventional
design (Tier II Plus) and an Low Observable configuration (Tier III Minus).

This Global Hawk UAV returned from  Iraq on Monday under its own power. (Iraq to Edwards AFB in CA) - Not transported via C5 or C17. Notice the mission paintings on the fuselage.  It's actually over 250 missions. 

That's a long way for a remotely-piloted aircraft. Think of the technology (and the required quality of the data link to fly it remotely).  Not only that but the pilot controlled it from a nice warm control panel at Edwards AFB.  It has really long legs - - -it can stay up for almost 2 days at altitudes above 60k. 
Most people have no idea what stealth brings to the battle.  Basically, they come into the fight at a high mach thrust, start killing people way out with AMRAAMS, and continue doing that until everyone is dead, and no one ever sees them or paints them on radar.
Photo from FAS.org
There is practically no radio chatter because all the guys in the flight are tied together electronically at Edwards AFB, and can see who is targeting who, and they have AWACS direct input and 360°situational awareness from that and other sensors.