Deadly natural gas explosions in Massachusetts drew attention to the nation's aging pipeline infrastructure. We’ll drill down.

Aging Gas Pipelines: The Dangers Of Outdated Infrastructure Around The U.S.

In this Sept. 11, 2010, file photo, a natural gas line lies broken on a San Bruno, Calif., road after a massive explosion. A federal jury found Pacific Gas &amp; Electric Co., California's largest utility, guilty on Tuesday, Aug. 9, 2016, of misleading investigators about how it was identifying high-risk pipelines after the deadly gas line explosion in the San Francisco Bay Area. (AP Photo/Noah Berger, File)

Pipeline Explosion

Deadly natural gas explosions in Massachusetts drew attention to the nation's aging pipeline infrastructure. Gregory Korte, Kiera Blessing and Cynthia Quarterman join Meghna Chakrabarti.