By Erica Goode
The New York Times
WASHINGTON — The speed and deadliness of recent high-profile shootings have prompted police departments to recommend fleeing, hiding or fighting in the event of a mass attack, instead of remaining passive and waiting for help.
The shift represents a "sea change," said Chuck Wexler, executive director of the Police Executive Research Forum, which recently held a meeting in Washington to discuss shootings like those in Newtown, Conn., and Aurora, Colo.
Police: Citizens should act to stop mass shootings