A federal appeals court in Washington, D.C., was prepared to hear a Guantanamo Bay detainee case in open court Monday, though the lawyers involved in the dispute were prohibited from talking about the confidential record.

A minute into the argument, Chief Judge David Sentelle of the U.S. Court of Appeals for the D.C. Circuit had heard enough and abruptly closed the courtroom to the public. That meant about a dozen people in the courtroom were barred from sitting in court to hear oral argument.