LA Bridge Collapse Caught on Tape

A construction worker's blowtorch started the intense blaze that brought down the overpass.
1:20 | 05/06/14

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Transcript for LA Bridge Collapse Caught on Tape
The major highway that links los Angeles to Las Vegas, is shut down right now. It could be closed for days because of a fire on this bridge, causing a traffic nightmare, affecting hundreds of thousands of drivers. ABC's Cecilia Vega is in los Angeles. Reporter: The collapse, caught on camera. A nightmare on interstate 15, the major artery connecting L.A. To Las Vegas. Intense flames erupting after a construction worker's blowtorch ignited wooden supports on this overpass. The fire itself was pretty insane. Reporter: Debris, crashing down on to the freeway below. The result, traffic at a standstill for miles. Overnight, this view from the air, people trapped in their cars for hours on end. I'm trying to get around this stuff. Reporter: The entire bridge will now have to be rebuilt. $59 million already spent on repairs, down the drain. Workers forced to start all over. The highway, closed in both directions for two days. The good news, only one worker suffered minor injuries. No one else was hurt. For "Good morning America," Cecilia Vega, ABC news, los Angeles.

This transcript has been automatically generated and may not be 100% accurate.

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