MSNBC Live with Tamron Hall 12/18/14

Gas prices drop below $2 a gallon

For the first time in more than 5 years, gas is under $2 a gallon in parts of at least 24 states. Gasbuddy.com Senior Petroleum Analyst Patrick Dehaan explains why prices have dipped and how long we can expect it to last. ... more Duration: {{video.duration.momentjs}}