the guard shack that we could hear their voices and hear their conversation. >> the truck passed and leslie's group found the railroad tracks nearby that led to another town almost 30 miles away. >> we did not have a clue as to if we were going to make it to the next town, if we were going to live, if we were going the die. but we knew that we had to leave. >> that railroad is now gone. ripped up. the jungle reclaiming the route. all that remains is this railway bridge, which leslie remembers with dread. >> i recall a bridge -- i have a horrible fear of heights. horrible. and there was an area that we had to cross and i just had to get on my hands and knees and cross it. i couldn't stand up. i just couldn't. >> look closely and you'll understand her fears. you can see straight through the railroad ties to the river below. >> she was really scared. i was scared, too. >> robert paul joined up with