The RQ-4 was designed as a Air Force surveilllance aircraft and is one of the largest unmanned aircraft, and is used at high altitude. It is also one of the most expensive unmanned aircraft at $36,500,000 but at good bang for your buck, it has incredibly precise targetting. Later versions include the Navy version and the EuroHawk version both with new livery, engines, and specifications. The latest prototype is a NASA research, what may come next for the Global Hawk?
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