"The U.S. State Department has signed and issued a presidential permit to construct the Keystone XL pipeline. That reverses former President Barack Obama's 2015 decision to reject the controversial pipeline.

Pipeline company TransCanada says that in conjunction with the Trump administration signing off on its pipeline, it will drop a claim for more than $15 billion that it filed under the North American Free Trade Agreement. The company also says it will drop a lawsuit that claimed Obama's decision was unconstitutional."

Jeff Brady reports for NPR March 24, 2017. [2]