America's secret machine! They drill the mountain in one day!

Colossal Machines: America's Most Powerful Engineering Marvels Revealed. After retiring Bertha, the world's largest tunnel-boring machine, the United States secretly began developing an even larger TBM to create a revolutionary transportation structure. Hidden from international media, the project proceeded underground. Citizens only saw clouds of dust and heard loud noises. After extensive investigation, the identity of America's mysterious giant TBM has been revealed. Just how massive is this machine? Join us in this special episode as we unveil the American secret capable of drilling through a mountain in a day.. The Ultimate Discovery creates unique transformative content for educational and entertainment purposes and represents the opinions of this channel. If you believe your copyright has been violated please contact us directly [email protected]. We take out content seriously and all content meets legal standards for licensing or fair use. Any attempts to falsify content strikes via the YouTube copyright system will be dealt with by our legal team. We use Clonedub.com to translate our channel into different languages. For business matters: [email protected] Disclaimer: The content presented in our videos is intended solely for entertainment purposes. While we may draw upon facts, rumors, and fiction, viewers should not interpret any part of the content as factual or definitive information. Please enjoy responsibly. Check Out These Videos: America's secret machine! They drill the mountain in one day! https://www.youtube.com/watch?v=Z6jWB1sEuNo China's secret machine! They drill the mountain in a single day! https://www.youtube.com/watch?v=A7RVSU7QYjg Incredible Invention of China's secret machine! They drill the mountain in a single day! https://www.youtube.com/watch?v=MbOXYmul8DY