shell canyon, in the big horn mountain. >> rough, rugged, horrid terrain. of all the wrong ways she could have gone, it would have been the worst. >> reporter: she combed shell canyon back and forth in the growing dark. nothing. >> and all that time i kept thinking, why didn't i give her that hug? why dine give her that hug? i'd have given anything just to give her one hug. >> reporter: the setting sun in montana and wyoming, it can be a glorious thing. that evening for nine discouraged pilots it was terrifying. of course, they were entirely unaware of the disaster and the drama they didn't see on the ground. >>> coming up -- that ground was here. a forbidden back country, rife withan >> it puts that eerie a feeling in your body, makes the hair stand up on the back of your neck. >> but this hunter seeing something even more troubling in the sky. >> so the plane is flying right into a trap? >> yep. your body was made for better things than rheumatoid arthritis. before you and your rheumatologist move to another treatment, ask if xeljanz is right for you. xel