Um... cl-20 wasn't invented by the Americans. It was invented by the Chinese and first used by the Americans. No more than gunpowder was invented by the British despite using it on a larger scale in the past.
With cl-20 the Americans don't even use it on the scale of Russia... Apparently. But nevertheless this is a thoroughly Chinese "invention" BUT inventions are useless if you can't make and use them. Luckily china could and has made cl-20 and used it for some time. Just not in rocket propellant until recently.
With cl-20 the Americans don't even use it on the scale of Russia... Apparently. But nevertheless this is a thoroughly Chinese "invention" BUT inventions are useless if you can't make and use them. Luckily china could and has made cl-20 and used it for some time. Just not in rocket propellant until recently.