https://www.reuters.com/article/us-musk-tunnel/elon-musks-boring-co-to-build-high-speed-commuter-system-in-chicago-idUSKBN1JA224 >Chicago has selected billionaire entrepreneur Elon Musk's Boring Co to build a high-speed underground commuter system from the downtown Loop district to O'Hare International Airport, one of the world's busiest, the company and the mayor's office said.