Tire Blowout problems of the 2010 Toyota Prius

I turned into a parking lot and stayed way to the right because of a large truck on the drivers side and went over the curb and both tires blew.

While driving my 3 week old 2011 toyoya Prius with 1700 miles on the odometer on the freeway driving my daughter back to school my rear passenger side yokohama avid tire experienced a blowout. After successfully manuvering the car off of the freeway and to a safe location I installed the spare donut and then inspected the tire. The inside sidewall burst open and no road hazard was present. I filed a claim with yokohama tires and they had me have the tire inspected by discount tire in scottsdale, az. Their inspection suggested a manufacturers defect since they could not locate any punctures or other type of road hazard. At the time of the blowout I was 75 miles from flagstaff, az, my final destination on a Sunday late afternoon and could ot locate an open tire dealer or Toyota dealer that was open so I continued on the donut at 50 mph to flagstaff and located an open sears that had the right size replacement tire by another manufacturer. I had sears inspect the blown out tire and the rest of the tires and they concluded that the tire was defective based on their observations. I requested that yokohama professionally inspect the tire local to me so that I can carry it in as opposed to shipping it to them. Please let me know your thoughts and if there is anything else that I should do to document this issue. **please not that this occurred on a 2011 Toyota Prius*** there was no Prius model listed under 2011 Toyota models. . . . Please correct.