Ismail Haniyeh, the exiled political chief of Hamas, was killed in an airstrike in Tehran, where he had gone to attend the inauguration of Iran's new president. Hamas blames Israel for the assassination, which marks a pivotal moment in the Middle East conflict as Haniyeh was a significant player in Hamas' international diplomacy. Born in a refugee camp in Gaza, he joined Hamas in the late 1980s, rising swiftly through the ranks. He had been living in exile in Qatar since 2019.