The parties are directed to file letter briefs addressing 24, 2017, may render cases No. 16-1436 and 16-1540 moot. The parties should also address whether, or to what extent, the scheduled expiration of Sections 6(a) and 6(b) of Executive Order No. 13780 may render those aspects of case No. 16-1540 moot. The briefs, limited to 10 pages, are to be filed simultaneously with the Clerk and served upon opposing counsel on or before noon, Thursday, October 5, 2017. The cases are removed from the oral argument calendar, pending further order of the Court.