Elon Musk's Boring Company will build a privately funded high-speed tunnel, the Music City Loop, connecting Nashville International Airport to downtown. While state officials and the U.S. DOT secretary expressed enthusiasm, Nashville's mayor raised operational concerns and some residents voiced skepticism.

As reports surface about Elon Musk’s Boring Company planning a tunnel beneath Nashville, here’s a look at his existing ties to Tennessee.

Nearly a decade ago, the billionaire said he’d build a hyperloop. Since then, he’s mostly built tunnels for Teslas and his own employees.