Letterman stopped by his team’s garage and joked with WISH-TV racing analyst Derek Daly.
According to Carmel Police, Jordan English was last seen on Friday.
Carpenter’s car is decked out in Indiana colors.
The Hoosier tradition requires contributions from around the country, including orchids from Oregon.
Newgarden said he is confident going into the race.
One youngster named Payton is already attending his third Indianapolis 500.
Drivers say they pedal 60 to 70 miles a day depending on how hot it is.
Chief Engineer Dale Harrigle said they work with the teams to talk about tire pressure because every tire has a unique pressure.
Shirts, pennants and keychains are among the items that will be available.
Letterman said he is excited to be able to enjoy more races in the coming months following retirement.
24-Hour News 8’s Anthony Calhoun and Derek spoke with the drivers on race morning.
Inside the Honda Power of Dreams Display visitors can get a life like experience of racing.
Foyt, now 80, is a team owner and has three drivers in the race.
One of the changes is on the inside retaining wall.