Four big US cities say Elon Musk doesn’t have approval to build the Hyperloop, despite his claim
Elon Musk caused a stir by announcing the next great milestone in his bid to build a 500-mile underground transit link between major US cities on the east coast. Just received verbal govt approval for The Boring Company to build an underground NY-Phil-Balt-DC Hyperloop. NY-DC in 29 mins. — Elon Musk (@elonmusk) July 20, 2017…