Supreme Court Upholds Ruling Blocking Permit for Keystone XL Pipeline

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Trump Administration Approves Permit to Build Keystone Pipeline01:51

Trump Administration Approves Permit to Build Keystone Pipeline

Know Right Now: Obama Rejects Keystone XL Pipeline01:01

Know Right Now: Obama Rejects Keystone XL Pipeline

Watch: Keystone XL Pipeline by the numbers00:55

Watch: Keystone XL Pipeline by the numbers