Israel struck Evin prison in northern Tehran on Monday, a potent symbol of Iran's governing system, in what Israel called its most intense bombing yet of the Iranian capital a day after the United States joined the war.

Prime Minister Benjamin Netanyahu said the bombing campaign aimed to end the threats from Tehran’s nuclear program and ballistic missiles. He did not give a timetable for stopping the strikes.

Days into the Iran-Israel war, the United States has carried out a series of limited strikes centered on three Iranian nuclear sites. Where could this escalation head?