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Watch Jon Stewart Crash Stephen Colbert's Late Show Monologue

Cue 'Reunited.'

Jon Stewart's promotional tour in support of the renewal of the Zadroga Act already brought him back to his former home The Daily Show earlier this week. But when it comes to a literal life-and-death matter like health care for 9/11 first responders, one late-night comedy show is not enough. Here's what happened last night when he interrupted his old colleague Stephen Colbert's monologue on The Late Show. Trigger warning: Cheeto dust used as makeshift orangeface makeup. You'll...see why.

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