Can anybody think of a military leak that damaged or had the potential to damage national security?

Can anybody think of a military leak that damaged or had the potential to damage national security, besides the recent Wikileaks Afghanistan war reports?Can anybody think of a military leak that damaged or had the potential to damage national security?The 'quiet' submarine screw for boomers and attack submarines [US] to make them invisible to Soviet sonar during the 1980s. Japan was manufacturing them for the US but sold [leaked] the design to the Soviets secretly. If there'd been a sea war between the USSR and US the damage would have been revealed.



During WWII Enigma, or Ultra crypto machine for the Axis was unknown to be in the hands of the allies. That leak probably was responsible for the Axis losing WWII. If not, it certainly changed the duration and the outcomes of a lot of decisive battles.Can anybody think of a military leak that damaged or had the potential to damage national security?the blueprints of the A-bomb that was leaked out, that would of been quite detrimental to society if things gone sour, very sour in the cold warCan anybody think of a military leak that damaged or had the potential to damage national security?There was a similar leak during the Vietnam war called the Pentagon papers.