banging under the pipes underwater to starling them and move them. really, pipes? i m sorry? really, pipe snz. indeed, the whales are sensitive to sound, so the revving engines and also aluminum pipes they can bang in the water can help create a wall of sound that can drive the whales in a specific direction. i know that s one of the techniques they have been employing, and working hard to try to get the whales as quickly as possible back to deep water. it s positive. things are certainly looking up. i reported on this just a little bit ago, and it wasn t looking good, so this is good news. still, they re not out of the woods yet. hopefully with the school mentality, if they follow one another to this location, hopefully, they ll turn around and follow one another back out. philipp cousteau, thank you. we ll keep watching it. we will. up next, a unique behind the scenes look at the trainer that conductor s go through before driving a train. cnn has unique access to a