No more proof of what is needed?Those were not ATF agents working in Mexico. One was a Border Patrol agent, and I think the other worked for ICE, IIRC. ATF has a Mexico Country Office (what a clunky name) but no one there seems to have known about the gunwalking. <_<
The fact that it "could be" that approval for this operation came from the top is what makes me think Congress needs to investigate.
The big question is: what did Obama/Holder know and when did they know it?
The fact that the administration has hired a spin doctor is further proof that Holder is not the man to answer that question, as if any more proof were needed.