On September 16, 1974, a bomb exploded at the Grand Hotel in Brighton, England, where the British Conservative Party was holding its annual conference. The bomb was planted by the Provisional Irish Republican Army (IRA), aiming to kill Prime Minister Margaret Thatcher. Although Thatcher survived, five people were killed, and many others were injured. The attack was part of a series of IRA bombings during the Northern Ireland conflict. The bombing galvanized British resolve to fight back against the IRAs tactics.