The House on Wednesday is scheduled to vote on—and probably pass—legislation sponsored by Rep. Lee Terry , R-Neb., that would approve the Keystone XL pipeline and limit legal challenges on the project. The politically embroiled pipeline has been awaiting federal approval since September 2008 and its fate is still uncertain. Despite action by House Republicans, the State Department is expected to make a final decision later this year or early next. Here's what you need to know about a pipeline that's become much more than that.
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