"I'm going to frustrate all of you, infinitely, by telling you that now that we have an open FBI investigation on the death of these four Americans, we are not going to be in a position to talk at all about what the U.S. government may or may not be learning about how any of this this happened -- not who they were, not how it happened, not what happened to Ambassador Stevens, not any of it -- until the Justice Department is ready to talk about the investigation that's its got," State Department spokeswoman Victorian Nuland told reporters late...