What's behind the sudden drop in US gas prices?

Aired: 10/18/2014 | 0:03:40 | Clip
According to AAA, the average price of a gallon of regular gas in the U.S. dropped from $3.52 in late July to $3.12 today. Isaac Arnsdorf, an energy and commodities reporter with Bloomberg News, joins Hari Sreenivasan to explain the factors contributing to the drop.