Though Porsche is gone, Toyota will try, try again, now with Alonso.
She hopes to secure sponsorship for those races soon.
Here's why the halo won't work for the circuit.
Honda engines like Alonso's have had a run of bad luck. One blew up on Friday.
"Today we ticked all the boxes," Fernando Alonso said.
"We went through many, many things."
It's the 14th time a Corvette has paced the race.
Alonso drove 222 mph in his IndyCar rookie test.
And it is very orange.
Racing used to be exceptionally dangerous. Apparently, so was drinking cocktails like this.
Button will be the most experienced driver in the race as he makes his 306th start.
Alexander Rossi was clutch in the final laps to capture his first Indy 500 victory
This is the Ford Mustang convertible used to pace the 1964 Indianapolis 500. And you can own it for a suitcase full of money.
Roger Penske will celebrate the 100th running of the Indianapolis 500 by driving the Camaro SS 50th Anniversary Edition pace car.
IndyCar driver Tony Kanaan takes us for a hot lap around Indianapolis Motor Speedway in the 2015 Chevrolet Corvette Z06 pace car. The 99th running of the Indy 500 takes place this weekend.