据知情人士透露，美国五角大楼意外击落了一架海关与边境保护局的无人机，位置在在德克萨斯州与墨西哥的边境，使用的是高能激光器。几周前另一起事件曾导致混乱，并暴露了美国多个机构之间的沟通失误。
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Imagine a user named Erika. They are asked to set up encrypted backups in their favorite messaging app because they don’t want to lose their messages and photos, especially those of loved ones who are no longer here.