[twosheep]

Most of the trainings that I've gotten for active shooter-type events (gov't employee; they're frequent these days) advises you to silence your phone since the first thing that's gonna happen when the news shows up is everyone is gonna call you anyways.

[ihsw]

On a darker note, first-responders to the Paris attack distinctly recalled people's phones still ringing in their pockets when they arrived.