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In 1947, it represented the difference between victory and annihilation. Its aim: to push the envelope of flight to new frontiers. Shrouding the program in secrecy, the US military reluctantly revealed that the "barrier" had been broken two months later, after the story was leaked to the press.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.