President Barack Obama Rejects TransCanada Corp.'s Keystone XL Pipeline [Getty Images]

U.S. President Barack Obama speaks in the Roosevelt Room at the White House in Washington, D.C., U.S., on Friday, Nov. 6, 2015. President Obama decided to reject TransCanada Corp.'s Keystone XL pipeline, ending seven years of debate over an infrastructure project that swelled into one of the most contentious environmental issues of his presidency. Photographer: Andrew Harrer/Bloomberg via Getty Images

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