Balloon trip into "space"

In an attempt to break the balloon altitude record, two Brits will fly a helium balloon as tall as the Empire State Building to 40 km above Earth. OK, it's not really "space," but the pilots will be exposed to massive amounts of cosmic rays. That's why they'll be sporting space suits. Withouth them, their "blood would boil and (they'd) be vaporized above 63,000 feet because of the low air pressure."
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