PHOENIX — The State of Arizona and Trinity Industries, the maker of a controversial guardrail, are now facing a lawsuit one year after a teenager was killed, and another lost his leg in a crash on I-17. Jaxson Elliot and Jett Weinstein were on their way home from Flagstaff when they crashed into an ET-Plus guardrail. Pictures from the crash scene show the guardrail through the passenger compartment of the car…