@CNN: Take one of the first rides on Crossrail — London’s new subway line. The $20 billion underground rail service has been the biggest engineering project in Europe. https://t.co/cqOjKkUubZ https://t.co/a9a9DmIjku

@CNN: Take one of the first rides on Crossrail — London’s new subway line. The $20 billion underground rail service has been the biggest engineering project in Europe. https://t.co/cqOjKkUubZ https://t.co/a9a9DmIjku