In 2016 filmmaker/photographer Pete McBride and writer Kevin Fedarko set out on a 750-mile journey on foot through the entire length of the Grand Canyon. More people have stood on the moon than have accomplished this task. Their quest was more than just an endurance test — it was also a way to draw attention to the unprecedented threats facing one of our most revered landscapes...。一对深藏秘密的孪生姐妹和一位意志坚定的警督,试图揭开一桩谋杀未遂案的真相。。