https://www.reuters.com/article/us-musk-tunnel/elon-musks-boring-co-to-build-high-speed-airport-link-in-chicago-idUSKBN1JA224 >Chicago has selected Elon Musk's Boring Co to build a $1 billion underground transit system that will whisk people from Chicago's downtown Loop district to O'Hare International Airport at 150 miles per hour (240 km per hour), the billionaire entrepreneur and Mayor Rahm Emanuel said on Thursday.