Today's episode is the first of a three-part series about the 2018 collapse of the Florida International University pedestrian bridge in Miami, Florida.

In this part, you'll hear how the signals which could have prevented the collapse of the bridge were ignored, leading to the deaths of six people.

You'll also hear how the checks and balances put in place to identify these bad decisions failed. And how this bridge gave warning sign after warning sign that something was wrong, but the parties involved did little to act.

The more you hear about what happened, the harder you'll find it to understand why it happened.