Shia Muslim pilgrims gather near the Imam Hussein Shrine in the holy city of Karbala, south of Baghdad on August 1, 2026, at the end of their Arbaeen pilgrimage, which commemorates 40 days of mourning after the martyrdom in the Battle of Karbala in 680 CE of Imam Hussein, the grandson of the Prophet Muhammad. The Arbaeen marks one of the most significant events in the Shia Muslim calendar, during which pilgrims, many from Iran, flock to Iraq to visit the holy shrines. (Photo by AHMAD AL-RUBAYE / AFP via Getty Images)