Al Qaeda is about to take on a new target — America’s trains — in an upcoming edition of its terror magazine Inspire. Issue No. 17 is headlined “Train Derail Operations,” and will spell out ways to create rail disasters in a transportation system that lacks the stiff security procedures of airline travel. Its competing Sunni extremists group, the Islamic State, for more than a year has advocated using vehicles to mow down innocents. Its murderous followers have weaponized vehicles in Nice, Berlin and London, creating hundred of deaths and injuries. […] The U.S. maintains over 100,000 miles of rail....