everything. >> brannan son survived. >> basically that was all it said. >> what was that like? >> of course we wanted more details. >> it was a relief. >> zach was alive. all they needed to know for now. but georgia, still no word. while his parents worried about him at home, zach was riding out the chaos in kuji. >> i wasn't really sure what was going on at first. >> after the shaking stopped, zach and his co-workers moved to the top floor of city hall, a crow's nest with a view of the whole city and the coastline. >> if something is going to happen, this is where you'd see it? >> yes. >> then he saw it. something about the rivers that split the city and normally flow out to the sea. >> the river was beginning to flow in the opposite direction. the water began to change color as well, began going from this bluish color to being very murky. >> even four stories up, zach