breaking news as we come on the air, the deadly attack on capitol hill. a driver ramming his car into police officers at a capitol checkpoint. the suspect allegedly armed with a knife, lunging at police. the suspect shot and killed by police. one of the officers also killed. police swarming the scene. the national guard deploying an immediate response force. president biden lowering the flag to half-staff. pierre thomas standing by. also making headlines this friday night, the cdc issuing new travel guidance for people now fully vaccinated. health officials say they can safely fly within the u.s. without getting tested or going into quarantine. what the cdc is also warning about tonight. the news comes as the u.s. hits a new milestone. more than 100 million people now receiving at least one dose of the vaccine.