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A homeless man walking in an eastside Las Vegas neighborhood didn't hesitate to act when he saw plumes of smoke coming from an apartment building.

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CNN Money's Zain Asher explains how Bitcoin works and if it's the currency of our future.

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Philadelphia police Officer Jonny Castro has painted digital portraits of dozens of police and other first responders who have lost their lives in the line of duty.

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He recorded John Lennon's honeymoon and helped give Andy Warhol his start in filmmaking. So it makes sense, then, that the filmmaker and photographer Jonas Mekas -- often regarded as the godfather of American avant-garde cinema -- has a lot of stories.

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While taking photos on his wedding day, Clayton Cook pulled a child struggling to swim from a nearby lake.

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