A government lawyer asked the U.S. Court of Appeals for the Second Circuit on Thursday to reverse a lower court ruling that required federal agencies to produce documents related to the Trump Administration’s alleged “ideological screening” of immigrants and refugees at the border.

Assistant U.S. Attorney Jennifer Blain said the records, requested by the Knight First Amendment Institute at Columbia University in 2017, included sensitive training materials and procedures for identifying suspected terrorists that, if divulged, could provide a “playbook” for bad actors to evade detection.