Two African-American boys enter kindergarten at the exclusive and predominantly white, Dalton School on Manhattan's Upper East Side. One boy, Seun, leaves at the end of 8th grade. His friend, Idris, stays but struggles. "American Promise," filmed by Idris' parents over a 13-year period, looks at why.

If you didn't catch last night's PBS premiere, no worries. The film is playing online through March 6. And check out our Julianne Hing's October interview with Idris, here

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