Millions of Shiite Muslims observed the annual Arbaeen pilgrimage Aug. 4 in the Iraqi holy city of Karbala, under the shadow of ongoing regional tensions and fears of another round of escalation in the U.S.-Iran war.

Millions of Shi'ite pilgrims gathered in Iraq's holy city of Karbala for the Arbaeen pilgrimage, enduring temperatures of up to 50°C as authorities deployed cooling measures and…

Millions of Shiite Muslim pilgrims are making their way to the Iraqi holy city of Karbala ahead of Arbaeen, one of the world’s largest annual religious gatherings.