A circle that showed up

Here is what a good circle looks like in motion. The evening below is made up to show the sequence, but every step is exactly how FlagRisk is built to work.
The evening
Picture someone leaving work later than planned, heading across the city. Before setting out, they share the trip with two people, a sister nearby and a friend a few streets from the route.
The moment
Something feels wrong at a junction. One press, no sound, nothing on the screen. The live location goes out to the circle at once.
The response
The sister sees the alert and the location, marks that she has seen it so the others know it is handled, and moves. The friend nearby calls for help toward the same spot. Nobody had to be told what to do, because the circle was set up before it was needed.
The point
The tools matter, but the circle matters more. A few people who know they are in it, and know what to do, turn a frightening minute into a short one.
FlagRisk