What to do when you think the U.S. government is holding out on your FOIA request

In Heily v. U.S. Department of Commerce, the Fourth Circuit in a per curiam decision for the panel of Judges Widener and Niemeyer and Senior Judge Hamilton held that the the appellant had shown no basis to look beyond the affidavits and privilege logs submitted by the Department of Commerce in describing the documents not produced that were responsive to the appellant's FOIA request.