Mourners hold candles during a March 2021 vigil in Boulder, Colo., for the victims of a shooting at a King Soopers grocery store. Ten people were killed in that attack. Violent rampages carried out by ...

Revelers will flock en masse to ring in the new year at public gatherings across the country, but partygoers should be prepared for worst-case scenarios, one expert warns. "It seems like these days, ...