door-to-door hunt for these suspects, as you look at this very dramatic video playing out, and it reminds you of the risks, reminds you of the risks these heroes take every day around the world, but we're seeing it unfold right here. quite a situation. we will keep on top of it. jim sciutto, keep working sources. we'll continue to watch this scene. those first responders -- taking risks on the scene right there in barcelona. what dramatic video. again, one person killed at least 17 injured a van crashing into a crowd in a bustling neighborhood in central barcelona. police say most likely a terrorist attack. the white house chief of staff, says the chief of staff is aware of the situation and keeping the president of the united states abreast. trying to get more information from local authorities as well. we'll take a quick break and continue our coverage in just a moment. i kept looking for ways to manage my symptoms. i thought i was doing okay.