America's Endangered Species: Don't Say Good-bye

Photographers Susan Middleton and David Liittschwager travel around the United States, in a race against the clock to capture powerful portraits of America's most threatened creatures.Photographers Susan Middleton and David Liittschwager travel around the United States, in a race against the clock to capture powerful portraits of America's most threatened creatures.Photographers Susan Middleton and David Liittschwager travel around the United States, in a race against the clock to capture powerful portraits of America's most threatened creatures.