In his 1961 inauguration, President Kennedy pledged that America would do more for the world.

During a hike in the Great Smoky Mountains National Park in 1995, Don Barger climbed Chilhowee Mountain hoping to gaze across the valley below. All he saw was a wall of gray haze.

This story is part of the National Geographic 33. The son of nomadic ... “I did not leave because I dreamed about going to America.” He went to an agency that helped him transfer to Adelphi ...