The leader of Hezbollah says they will exact revenge on Israel for two days of attacks that killed dozens and wounded thousands. The News Hour is told that Israeli officials notified their U.S. counterparts they planted explosives in the pagers and walkie-talkies that exploded this week. Now, Israel is bracing for retaliation. Nick Schifrin reports. A warning, images in this story are disturbing. PBS News is supported by - https://www.pbs.org/newshour/about/funders