Presented as part of PBS's American Experience series, this film highlights Civil War veteran John Wesley Powell, who led an epic journey down the Colorado River through the Grand Canyon in the summer of 1869. This young adventurer was on the last important exploration of the continental United States. What he found he wrote about and for ten more years he continued to explore the region. Unwrap the world of John Wesley Powell and make dramatic discoveries about Native American cultures. Learn why as director of the U.S. Geological Survey Powell argued against overdevelopment of the West. Peter performs the voice of Powell.   (60 minutes)