recorded incident of its kind in nine years of the use of the IR03 and later IR05 model chassis, which was being retired at the end of the race. The pull-rod suspension chassis is not being utilised in the DW12, however, a similar penetration in a DW12 would later cause significant injury to James Hinchcliffe during practice for the 2015 Indianapolis 500. Legacy Since Wheldon's death at the Las Vegas oval, much emphasis has been put into the elimination of "pack racing" through changes to the tires and downforce levels on high-banked ovals (particularly at Texas Motor Speedway, for its annual IndyCar event). Such racing has been seen on occasion since the Vegas race, most notably at the 2015 MAVTV 500 at Auto Club Speedway (which ended with contact entering the final lap that sent Ryan Briscoe, subbing for Hinchcliffe, airborne), and the 2017 Rainguard Water Sealers 600 at Texas, where "pack racing" again reappeared (the latter event also featured a NASCAR phenomenon known as "The Big One") and only a handful of drivers finished the race, although none were seriously injured. However, for the most part the league has avoided pack races in the years since the 2011 Finale. Talk of a canopy or halo to protect the driver was accelerated by the fatal Formula One accident that killed Jules Bianchi in October 2014 and an incident where Justin Wilson was fatally struck in the head by debris at the August 2015 ABC Supply 500 at Pocono Raceway. In particular, following Wilson's death, Allmendinger stated that he would "never again" run open-wheel cars, adding "The only way I would do it is if they put in a closed cockpit over the car and tested it and they thought that was a good direction in safety then I might think about doing it again." As a result, several major open-wheel series have implemented cockpit protection systems, with Formula One, Formula Two, Formula Three and Formula E all introducing the halo in 2018, and IndyCar instituting the Aeroscreen in 2020. The rear wheel pods introduced to IndyCar in 2012 intended to prevent cars from becoming airborne when hitting another in the rear proved to be ineffective as there were major crashes resulting from such contact, including Dario Franchitti's career-ending crash during the 2013 race in Houston, as well as the 2017 Indianapolis 500 involving Scott Dixon. In addition the pods were