The engineers of the pedestrian bridge that collapsed at Florida International University last year failed to recognize that the bridge was in danger of failing.

Katrina Collazo is suing the engineers and construction companies involved.

Witnesses who saw the bridge fall described the horror that followed afterward.

Authorities say six people died when the bridge collapsed Thursday.

The deadly Miami bridge collapse this afternoon "felt as if there was an earthquake," a witness told ABC News.

Out of the three VSL Structural Technologies workers who were on the site, one is dead and two are in the hospital.

An engineer reported cracks in Florida bridge days before collapse but the message wansn't heard until Friday, officials said.

Six were killed and many others injured when the bridge collapsed Thursday.

At least two of the firms have been sued or fined before.

Six people have died from the collapse of a newly installed pedestrian bridge in Miami, but that number is expected to increase.

First responders could be seen loading injured victims onto stretchers and searching for people under the rubble.

The technique used to build the bridge that collapsed in Miami today was intended to cause less disruption and make installing new bridges easier.

The bridge, which costs $14.2 million, was designed to withstand a Category 5 hurricane.

"All of a sudden, I saw it collapse from the left towards the middle," she said.