Gwinnett County Fire services respond to a fatal multi-vehicle crash scene that caused a massive fire that is blocking all lanes of I-85 near the Jimmy Carter Boulevard exit in Gwinnett County on Saturday, February 1, 2020. The blaze was the result of a crash involving a tractor-trailer that left one person dead about 8 a.m., Gwinnett police said. (Hyosub Shin / Hyosub.Shin@ajc.com)