What is the biggest secret that Snowden has given away?

Was it the fact that Britain was spying on other countries at the G20 Summit? Or was it the fact that America had been hacking China's computers since 2009? Or is it something we do not yet know and has not been published?

How much damage has he done to our diplomatic relations around the world? Just what damaging information did he have on that thumb drive? So far, there has been very little exposed for our friends and allies to be concerned about. Of course, we don't know what is yet to come?

But the biggest secret he has given away thus far was the fact that our government was spying on its own people and creating a massive data base with phone logs, etc. The biggest secret thus far is not giving away foreign operations but giving away domestic operations. When he starts giving away names and locations of CIA assets, then we might be able to take their whining a little more seriously.