As President Obama heads to Oklahoma today to announce the fast-tracking of the southern portion of the Keystone XL oil pipeline from Oklahoma to Texas, we speak with 350.org’s Bill McKibben. The pipeline approval comes two months after Obama rejected a proposal for the 1,300-mile Keystone XL pipeline from the Alberta tar sands oil fields to Texas after large protests by environmental groups. It also comes at a time when much of the nation is experiencing a heat wave that some scientists and meteorologists have linked to climate change. Spring only began on Tuesday, but it has felt like summer this week throughout much of the Northeast, Midwest and parts of Canada. Record temperatures have been recorded in Chicago, Detroit, Cleveland, Indianapolis and Buffalo and many other cities and towns. Some 36 states set daily high temperature records last Thursday.