On Nelson Mandela's birthday, photographer Scott McDermott captured famous faces – e.g. Clint Eastwood, Robert DeNiro, Forest Whitaker and Morgan Freeman - raising hands to pledge to improve their planet. In Kelly's film, writer Elliot Kotek ponders the real-life and character experiences behind these simple digits - war, peace, violence, freedom, fame, disease - each represented in the lines made, in the hands we raise.

A simple gesture. At the right moment. Can change the world.

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