Evin Prison was hit by Israeli airstrikes the day before a ceasefire ended a 12-day war with Iran. The damage is much greater than thought at the time. We walked through what's left of its gates, now a mass of rubble and twisted metal, among just a handful of foreign news media allowed in.

Iran said that Israel's strike on Tehran's Evin prison killed at least 71 people, including staff, soldiers, prisoners and members of visiting families.