Video: Into the wilderness with US President Barack Obama

US President Barack Obama walks through the wilderness of Alaska with Bear Grylls, the world famous survival expert on Discovery programs. President Obama's trip is in Discovery's Running Wild with Bear Grylls program.

With the aim of witnessing the glacial melting speed by the effects of climate change and calling on people to raise awareness about climate change. Mr. Obama is the first US president to accept the Exit Ice challenge in the Harding ice field.

President Obama's trip is in Discovery's Running Wild with Bear Grylls program.

Before the White House boss, Running Wild with Bear Grylls program was attended by many famous people. Participants must overcome the risky challenge with Grylls. Meanwhile, the most dangerous thing that Obama does when he is US president is sitting on a golf cart.