事情发生于印第安纳州穆尔斯维尔（Mooresville）。据媒体报道，本周二晚警方接到了匿名举报，举报人称有人计划于情人节当天枪袭穆尔斯维尔高中（Mooresville High School），犯人有一支AR-15步枪，还订购了一件防弹背心。

Time off from digital devices. Find out how a school in England challenges students to stay away from their gadgets ...