CNBC: Will the Shale Revolution Lead to US Energy Independence?

"I think the most immediate impact has been on the US's ability to import light sweet crude and you can see the US only imports one million barrels per day of that, because all the Shale production is really light sweet and as result you are starting to see lighter crudes trading less strongly," Amrita Sen, commodities analyst at Barclays Capital, told CNBC.