A YouTube workplace safety video providing instructions on how to react to an "active shooter" has gone viral after the mass killing in Aurora, Colorado.
The city of Houston's Mayor's Office of Public Safety and Homeland Security produced the informational video, titled "Run. Hide. Fight. Surviving an Active Shooter Event" and released it after the Colorado movie theater incident.
By Aug. 3, news organizations across the country featured the six-minute video portraying an office shooting.
To increase one's chances of survival, the video encourages people to evaluate the situation and, among several other measures, "Always try to escape and evacuate even if others insist on staying."
And if hiding is an option, don't forget to silence your cell phone, the video advises. As a last resort, fight with improvised weapons.