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Why does a helmet of an F-35 pilot cost $400,000? What actually is in one of these US Air Force helmets? Pilot helmets-long gone are the days when ace pilots took to the skies with just a pair of goggles and a leather helmet to protect from the cold. Nowadays …

The F-35 Lightning II Joint Strike Fighter is estimated to be the most expensive weapons system in human history, based on its projected lifetime cost of $1.5 trillion dollars ($406 billion for the aircraft, the rest in lifetime operating costs)—and that’s before we factor in the endless cost overruns. However, …