volunteer volunteer

President Trump spent the Martin Luther King Jr. holiday at his Mar-A-Lago resort in Palm Beach, Fla. Previous presidents have marked the holiday doing volunteer work. Nicholas Kamm/AFP/Getty Images hide caption

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Nicholas Kamm/AFP/Getty Images

Volunteers serve free dinner to homeless people at Robin Hood restaurant in Madrid. Pablo Blazquez Dominguez/Getty Images hide caption

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Pablo Blazquez Dominguez/Getty Images

Spain's 'Robin Hood Restaurant' Charges The Rich And Feeds The Poor

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