In July, Matthew Alan Livelsberger was posting to Facebook photos of himself proudly posing with his newborn child. He was in the middle of a highly decorated career in the U.S. military. Six months later, the 37-year-old was dead and named as the man whose Tesla Cybertruck exploded on Wednesday outside the Trump International Hotel in Las Vegas. After driving up and down Las Vegas Boulevard for an hour, Livelsberger pulled into the Trump hotel and died of a self-...