Wheldon: The month of May is very enjoyable, but you can get very frustrated. This month was probably the most mentally tiring I've ever had in my life. We started off the first day as the quickest in the field. We finished the month well also. But some days in between, for whatever reason, the car was just not as quick. It wasn't a mile an hour, it wasn't two, it was three or four. It made it very frustrating and very hard to develop the car, because you weren't sure if the problem was with the car or that the track conditions had changed or something like that. On the whole, the month was very, very competitive, more competitive than even people thought--and people never underestimate the 500. We worked every minute to just try to improve the performance. In the race, we'd been running in traffic a lot. It was very difficult to pass because it was so tight. With better drivers now, they don't make mistakes as often. So it's difficult to capitalize on anything when they're not doing anything wrong. But eventually we just worked our way forward. We improved the car at every single stop. With 30 laps to go, I'm sitting in the lead, with Danica [Patrick] pushing me pretty hard. We kind of went back and forth, but it was one of those races where my car was not bad to start with, but it wasn't great. The changes we made not only made the car quicker and better and more comfortable through traffic, but when I got into the lead I was also able to stay in the lead. It's tough to get that combination because normally if you want to be good in traffic, you have to have a ton of down-force. But if you have a ton of down-force, you're slow when you're out front and on your own. We managed to maximize exactly what we had.