This episode is brought to you by Slack. With Slack, you can bring all your people and

tools together in one place. It's your digital HQ where you can increase productivity,

enable flexibility and automate workflows. Plus, Slack is full of game-changing features,

like huddles for quick check-ins, or Slack Connect, which helps you connect with partners

inside and outside of your company. Slack, where the future works. Get started at

Slack.com slash DHQ.

Our episodes deal with serious and often distressing incidents. If you feel at any time you need support,

please contact your local crisis centre. For suggested phone numbers for confidential

support, please see the show notes for this episode on your app or on our website.

It was cold and rainy in Los Angeles County on the morning of Wednesday, January 26, 2005.

Shortly before 6am, Jenny Dull pulled into the deserted car park of the Costco retail warehouse in

Glendale, a suburb 10 miles north of downtown LA. While dark, quiet and dreary outside,

the interior of the Costco was bright and bustling, with employees preparing for the day ahead.

Jenny began work at the loading dock. A few minutes into her shift, a thunderous

roar blasted through the building, causing the entire warehouse to shake. Within moments,

the area fell eerily silent. Jenny stopped what she was doing and looked

anxiously at those around her. Once their shock had worn off, the workers rushed out to investigate

the source of the frightening noise.

Earlier that morning, engineer Bruce Gray boarded a Metro link 100, a blue and white double-decker

train headed for downtown LA. Over 100 commuters were spread out behind him on the trains upper

and lower compartments. Bruce entered the front carriage and took his position behind the controls.

Metro link 100 reached the speed of around 80 miles per hour as it hurtled from station to station.

...