You can assert a fifth amendment privilege and not testify. But if you go in and swear to tell the truth, then you better do it. Otherwise, if a prosecutor finds that you have testified in a way that is factually incorrect and you had reason to know that it was factually incorrect, then you're guilty of perjury.
Richard Ben-VenisteWere there contacts over time between Iraq and al-Qaeda? Yes, there were efforts made to communicate. We found no evidence of collaboration in any effort to mount any kind of operation against the United States' interests.
Richard Ben-VenisteWell, changes have been made. The question is whether we've done enough by way of change.
Richard Ben-Veniste