Very secret case

So secret that the judge can't read a government motion in his chambers.  Via the Sun-Sentinel:

The evidence against two Broward County brothers accused of plotting a terrorist attack is voluminous, a government prosecutor said Friday, and could take months for defense lawyers to sort out.
Assistant U.S. Attorney Karen Gilbert also told U.S. Magistrate Judge John J. O'Sullivan the government is drawing up a highly secret motion in Washington, D.C., to be hand-delivered to the judge by special courier. "Because of the classification level, you'll have to view it somewhere else than your chambers," she said.
Gilbert told O'Sullivan that she has turned over to defense attorneys nearly all the government's evidence in the case of Sheheryar Alam Qazi, 30, and his brother Raees Alam Qazi, 20. The Oakland Park men, 2000 immigrants from Pakistan, are charged with plotting to detonate a bomb somewhere in New York City.
Much of the evidence consists of wiretapped recordings and computer correspondence, Gilbert told the judge during a hearing in Miami federal court, enough to fill a file cabinet.
"There are thousands of audio sessions of different lengths," she said. "There's probably thousands of emails. It would take weeks, if not months, to get through."

If the judge can't look at the motion in chambers, can the prosecutors prepare it in their offices?  Where do they review the evidence?