Butch Cassidy and the Sundance Kid planned and executed the most daring robberies of the Old West, targeting banks, railroads and mines. As the sun rose on the twentieth century, they could not outrun the rapid growth of new technology and sprawling cities that altered the landscape and their very way of life. With high prices on their heads, Butch and Sundance fled to South America, where they supposedly met their deaths in a blaze of glory. This biography traces the lives and mysterious deaths of two Wild West icons who defied a nation.