Fans fill the stands as Colton Herta leads the field in the early laps of the Indianapolis 500 auto race at Indianapolis Motor Speedway in Indianapolis, Sunday, May 30, 2021. About 135,000 spectators, about 40% of the speedway’s capacity, were admitted to the track for the largest sports event since the start of the pandemic. (AP Photo/Paul Sancya)

E.J. Falk, of Detroit, wears a face covering at the Indianapolis 500 auto race at Indianapolis Motor Speedway in Indianapolis, Sunday, May 30, 2021. (AP Photo/Paul Sancya)

A fan holds his face mask as he sings "Back Home Again In Indiana" before the Indianapolis 500 auto race at Indianapolis Motor Speedway, Sunday, May 30, 2021, in Indianapolis. (AP Photo/Darron Cummings)

Fans fill the stands during the Indianapolis 500 auto race at Indianapolis Motor Speedway in Indianapolis, Sunday, May 30, 2021. About 135,000 spectators are admitted to the track, for the largest sports event since the start of the pandemic. It's about 40% of attendance and leaves 100,000 empty seats in the permanent grandstands. (AP Photo/Paul Sancya)

A fan waves during ceremonies before the Indianapolis 500 auto race at Indianapolis Motor Speedway in Indianapolis, Sunday, May 30, 2021. (AP Photo/Darron Cummings)

Fans picnic behind the stands before the start the Indianapolis 500 auto race at Indianapolis Motor Speedway in Indianapolis, Sunday, May 30, 2021. (AP Photo/Darron Cummings)

Fans fill the stands during the Indianapolis 500 auto race at Indianapolis Motor Speedway in Indianapolis, Sunday, May 30, 2021. About 135,000 spectators are admitted to the track, for the largest sports event since the start of the pandemic. It's about 40% of attendance and leaves 100,000 empty seats in the permanent grandstands. (AP Photo/Paul Sancya)

Helio Castroneves, right, of Brazil, celebrates after winning the Indianapolis 500 auto race at Indianapolis Motor Speedway in Indianapolis, Sunday, May 30, 2021. (AP Photo/Darron Cummings)

Helio Castroneves of Brazil celebrates after winning the Indianapolis 500 auto race at Indianapolis Motor Speedway in Indianapolis, Sunday, May 30, 2021. (AP Photo/Darron Cummings)

Ed Carpenter talks with fans through the fence before the Indianapolis 500 auto race at Indianapolis Motor Speedway in Indianapolis, Sunday, May 30, 2021. (AP Photo/Michael Conroy)

Scott Dixon, of New Zealand, leads the field into the first turn at the start of the Indianapolis 500 auto race at Indianapolis Motor Speedway in Indianapolis, Sunday, May 30, 2021. (AP Photo/Paul Sancya)

Fans fill the stands before the Indianapolis 500 auto race at Indianapolis Motor Speedway in Indianapolis, Sunday, May 30, 2021. About 135,000 spectators, about 40% of the speedway’s capacity, were admitted to the track for the largest sports event since the start of the pandemic. (AP Photo/Michael Conroy)

Fans take a photo before the Indianapolis 500 auto race at Indianapolis Motor Speedway in Indianapolis, Sunday, May 30, 2021. (AP Photo/Darron Cummings)

Veronica Pfister, R.N., administers a Johnson and Johnson Covid-19 vaccine to race fan Joshua Knight, of Noblesville, Ind., at the Indianapolis Motor Speedway before the Indianapolis 500 auto race in Indianapolis, Sunday, May 30, 2021. (AP Photo/Paul Sancya)