Inside the massive mosque in Tehran for the funeral of Supreme Leader Ayatollah Ali Khamenei

Mourners wept openly, and some shouted for “revenge,” NBC News’ Richard Engel reported from inside the sprawling Grand Mosalla mosque complex.

TEHRAN, Iran — Despite the withering heat, tens of thousands of mourners streamed into Tehran’s sprawling Grand Mosalla mosque and prayer complex Saturday for the funeral of Supreme Leader Ali Khamenei, openly grieving while also voicing anger toward the U.S.

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