The cause is the worldwide clean water crisis, and it brought out Jessica Biel, Emile Hirsch and several other notables to climb Africa’s tallest peak.
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The group is in its second day of the trek, with supporters pledging money for every foot they climb.
Jessica is a novice mountain climber but is in such fantastic shape from her daily fitness routines that she’s reportedly more than holding her own.
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The climb was organized by Summit on the Summit.
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Click here to see photos of Jessica starring in Guys & Dolls on stage.