The newly installed head of the U.S. Capitol Police on Tuesday told lawmakers that the agency wasn’t prepared enough for Jan. 6, when protesters stormed the U.S. Capitol during a joint session of Congress. Acting Chief Yogananda Pittman told members of Congress in a closed door briefing that what happened earlier this month was “a terrorist attack by tens of thousands of insurrectionists determined to stop the certification of Electoral College votes.” Federal authorities told reporters in a call around the same time that aren’t weren’t sure how many people entered the Capitol on Jan. 6. While the U.S. Capitol Police fulfilled its mission of protecting members of Congress, its “inability to immediately secure the U.S. Capitol emboldened the insurrectionists and horrified millions of Americans,” Pittman said in prepared remarks released to the media by the House Appropriations Committee. Pittman offered her “sincerest apologies” on behalf of her department. The …