According to the
Indianapolis International Airport Art Program, it's called "Elemental Indiana" by
Dale Enochs -- number 5 and maybe 6 on the interactive map. His resume doesn't mention any FIRST connection. He does do lots of small and large stone work.
For that area of the airport, between ticketing and security, they probably wanted some soothing Indiana-themed background art to walk by. In the boring, sit-and-wait areas you want something more exciting, like a giant marble roller.
Looks like a nice airport.