The Israeli military carried out dozens of airstrikes against the Lebanese militant group Hezbollah on Thursday, one of the most intense waves of bombardment this year. The strikes came hours after Hezbollah’s leader vowed that “retribution will come” to Israel after audacious attacks on Hezbollah’s pagers and walkie-talkies. The device explosions killed at least 37 people and left many Israelis and Lebanese fearful of a worsening conflict between Hezbollah and Israel.