On April 22, the State Department public comment period on a supplemental environmental review of the Keystone XL pipeline ended. The department will now review the comments and prepare a final environmental impact statement. Once the final statement is issued, the department will start the process for making a national interest determination on whether to issue a cross-border permit for the project, which would run from Canada down to Texas. The determination is subject to a 90-day interagency review, with the president making the final decision on the project.