In November 1805, after a perilous trek across North America, William Clark and Meriwether Lewis finally spotted the Pacific Ocean. It was a triumphant, hard-won victory following a year-and-a-half of braving the elements and risking death by starvation, wild animals, and hostile Native American tribes. Who were these explorers who accomplished what no other white men had? And who helped them in their incredible journey across an uncharted, sometimes...