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Dozens of law enforcement vehicles line Bircher Blvd., outside ABB's complex, on Jan. 7, 2010. A disgruntled employee had shot and killed three people and wounded five others before turning the gun on himself.
Bill Greenblatt | UPI

The top news story early on Jan. 7, 2010, was the winter weather. Three inches of snow had fallen overnight, and it was still snowing. Temperatures were in the teens with gusty winds.

But before the sun rose, everything changed. Timothy G. Hendron, 51, an employee of transformer manufacturer ABB, walked into the factory complex in north St. Louis and opened fire. He would kill three people and wound five before turning the gun on himself, in St. Louis’ first mass workplace shooting.

Adam Allington / St. Louis Public Radio

The St. Louis Police Department is planning free seminars for businesses and schools to receive training for an “active shooter” scenario.

St. Louis Police Chief Sam Dotson says the recent spate of high-profile tragedies across the country underscores the need for more training.

Shortly after taking over as chief Dotson met with the representatives from public and private schools to begin the process.

(All photos by Rachel Lippmann/St. Louis Public Radio)

The last time they congregated outside like this, the temperatures were in the teens, the wind was howling, and there were four inches of snow on the ground. And they were scared for their lives.