Eric Holder actually said...

Yes. There are exceptions to Miranda, and that is one of the ways in which we conduct our interrogations of terrorism suspects.

To ensure the public safety, we are allowed to ask those questions without giving Miranda warnings.

With Abdulmutallab and Shahzad, we made extensive use of the public safety exception before a decision was made to give them the Miranda war...

I appreciate your recognition of the Department's critical mission, and I look forward to your continued partnership and support.