The US government failed to keep instructions for building Atomic bombs from Russia. After realizing that failure they then designed and built the far more powerful Hydrogen bomb, which was quickly copped by the Russians. This information has then leaked around the world. You can trace every atomic bomb program in the world back to information gathered from the US.

PS: Governments have discovered the best way to keep secrets is to tell as few people as possible. There are not 10,000 people who know how to create the best radar absorbing paint used by the Air force. So, even as we are constantly compromised each leak is limited to what that person or computer system knows.