Back in the United States, FBI Director Robert Mueller acknowledged Tuesday the FBI has made hundreds of errors in its use of national security letters to access personal information of U.S. citizens. Mueller was testifying before the Senate Judiciary Committee. It was his first appearance at a hearing since an audit this month found numerous errors and possible breaches of the law. Senator Patrick Leahy of Vermont said the Judiciary Committee will begin re-examining the FBI’s broad authorities granted under the PATRIOT Act.