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WASHINGTON (WUSA) --He became famous on "Happy Days" but now Henry Winkler is putting his star power to work on Capitol Hill.He's in town on Tuesday to promote The Open Arms Campaign, raising awareness of Upper Limb Spasticity.

Henry Winkler talked to us about how his mother had a stroke and then suffered the debilitating conditional called Upper Limb Spasticity (ULS), which affects about 2 million American stroke patients. ULS is under-reported and undertreated.

Watch our interview with Winkler above.

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