Rahal Letterman Lanigan Racing Iowa Corn 300 – Iowa Speedway Verizon IndyCar Series RACE NOTES/QUOTES – Sunday, July 9, 2017 RAHAL FINISHED FIFTH IN THE IOWA CORN 300 AT IOWA SPEEDWAY GRAHAM RAHAL, No. 15 GEHL Dallara/Honda/Firestone:  “I’m really proud of the GEHL team. I wanted to win today so I’m disappointed with fifth, which…