 Secret Service Director Kimberly Cheadle is expected to appear before lawmakers who have been expressing anger over security lapses that ultimately allowed a gunman to injure former President Trump, kill a rally attendee, and critically injure two others. Lindy Kenyon, CBS News, Washington. And now, a special update from the WTOP Traffic Center. Of course, this afternoon we've been following the situation with this truck that hit an overpass on the Beltway. WTOP's Steve Drezner joins us with more.