Hillary Clinton said Sunday the FBI hasn't contacted her yet to testify in their investigation of her using a private email server during her stint as secretary of state.In an interview on CBS News'the Democratic front-runner said she's ready "to talk to anybody, anytime.""I've encouraged … all of … my assistants … to be … very forthcoming. And I hope that this is close to being wrapped up," she said in remarks released ahead of the airing,"No one has reached out to me yet, but last summer, I think last August, I made it clear I'm more than ready to talk to anybody, anytime."Pressed by John Dickerson if anyone from the FBI had told her they'd like to "sit down and talk to you," Clinton said: "Not at this point.""It's a security inquiry," she said. "I always took classified material seriously. There was never any material marked classified that was sent or received … by me. And I … look forward to this being wrapped up."She also reiterated that it was a mistake to use a private email server."And I will say it again, as often as I need to. It seemed like a convenient … idea at the time, but certainly it wasn't," she said. "I always take classified material seriously. There's no argument about that that I'm aware of. And I will continue to do so — and within whatever— parameters are required for the president, which I know a little bit about, having served with President Obama.""I know I've got to do my very best to … answer any questions that are raised about me in any context," she added. " I've been doing that for 25 years, so I do have a lot of experience … with it."