Dozens of people have been killed in Lebanon as Israel resumes airstrikes, targeting Hezbollah's underground headquarters. The airstrikes involved planes fitted with 2,000-pound bombs, including bunker busters that can penetrate underground before detonating. The Biden administration had previously paused a shipment of these bombs to Israel due to concerns over civilian safety. The attacks have destroyed at least four apartment buildings and caused significant casualties. The escalation of Israel's campaign against Hezbollah has raised fears of a wider regional conflict involving Iran.