FILE - Bright red signs alert non-authorized personnel at the entrance to the House SCIF, the Sensitive Compartmented Information Facility, located three levels beneath the Capitol where witnesses and lawmakers hold closed interviews in the impeachment inquiry on President Donald Trump's efforts to press Ukraine to investigate his political rivals, in Washington, Nov. 6, 2019. When members of Congress want to peruse classified materials, they descend deep into the basement of the Capitol to a sensitive compartmented information facility, known as a SCIF. (AP Photo/J. Scott Applewhite, File)