We all knew this already. The US government even runs some Tor servers I'm pretty sure. We've known it isn't a very safe protocol for a while now.
I wouldn't say that. It does what exactly it's supposed to: keep the origins of HTTP requests anonymous. It isn't made to keep information you transfer you being seen; passwords without SSL encryption for example. Many people don't realize this, thus the FBI's collection of information from idiots. tl;dr Tor does exactly what it's meant to do, which is less than many people expect.it isn't a very safe protocol
It appears to scan traffic looking for anything directed at a tor server or known bridge ip address. When it detects a match it records the users ip address and im sure passes it on for stotage. From that point on your traffic is monitored until you change ip address.