Fire knocks out power to part of Boston's mass transit system

Plus, a new gene therapy treatment to battle leukemia in children and young adults.
0:54 | 07/13/17

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Transcript for Fire knocks out power to part of Boston's mass transit system
To be a mix of other news tonight fire knocking out power to part of Boston's mass transit system the TS it's called air trains on the Green Line stop in their tracks. But 300 passengers evacuated forced to walked through the tunnels there two people taken to hospital. Minor injuries a major medical breakthrough tonight and FDA panel approving the first of its kind gene therapy to battle leukemia in children and young adults. Novartis pharmaceuticals and the University of Pennsylvania. Developing the drug referred to as car T therapy. Doctors in Philadelphia safe Emily Whitehead the first pediatric patient to receive the treatment. Has been cancer free for more than five years the FDA's final decision is expected September really encouraging. And how bout them cowboys tonight Forbes revealing that Dallas Cowboys is the most valuable sports team in the world. The team were four point two billion the New York Yankees are second valued at three point seven billion. And course the followed by soccer. And Manchester United.

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

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