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As record-setting heat swelters much of the U.S., millions are marking the 250th anniversary of the country’s founding with massive parades, firework shows, concerts and barbecues. Follow live.

Slain supreme leader's funeral

Massive crowds gather to mourn Iran's Ali Khamenei as a dayslong commemoration begins. CNN is in Tehran – follow live updates.

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Huge crowds gather for funeral of Supreme Leader Ayatollah Ali Khamenei, with millions expected to attend. Richard Engel reports from Tehran.