Environmental groups sue Trump administration for approving Keystone pipeline.

U.S. President Donald Trump smiles after announcing a permit for TransCanada Corp's Keystone XL oil pipeline while TransCanada Chief Executive Officer Russell Girling (L), U.S. Commerce Secretary Wilbur Ross (C) and U.S. Energy Secretary Rick Perry (R) stand beside him in the Oval Office of the White House in Washington, U.S., March 24, 2017. REUTERS/Kevin Lamarque
U.S. President Donald Trump smiles after announcing a permit for TransCanada Corp’s Keystone XL oil pipeline while TransCanada Chief Executive Officer Russell Girling (L), U.S. Commerce Secretary Wilbur Ross (C) and U.S. Energy Secretary Rick Perry (R) stand beside him in…

REUTERS/Kevin Lamarque