US believes Iran is preparing to imminently launch attack against Israel

The White House says it's preparing to help defend Israel against an attack, as the IDF continues its ground offensive in southern Lebanon. CNN’s Arlette Saenz and Jim Sciutto report. #CNN #News Want to stay up to date on the day’s top stories? Sign up for CNN’s 5 Things newsletter, and we’ll give you the 5 biggest stories you need to know, videos people are watching, and more! Sign up here: https://www.cnn.com/newsletters/5-things?source=nl-acq_social_youtubedesc&utm_source=nl-acq_social_youtubedesc