President Barack Obama preached his climate change agenda as he hiked around the wilderness with Bear Grylls - but the most powerful man in the world was also left dumbfounded by an iPhone.
The Commander-in-chief's hour-long appearance on Running Wild aired on NBC on Thursday night, and showed his concern at a disappearing glacier in Alaska.
'This climate change agenda is important as anything I will ever do,' Obama said, before he discussed drinking his own urine with the survival expert.
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