CHICAGO >> A federal judge preparing for a Chicago terrorism trial is set to hear oral arguments on what, if anything, the government must reveal about its use of expanded surveillance.

Friday’s hearing presents a rare chance to hear debate in open court regarding secret U.S. spying programs as revealed by former government contractor Edward Snowden.

Adel Daoud has pleaded not guilty to trying to ignite an inert bomb outside a Chicago bar. The device was given to the Chicago-area teen as part of a 2012 FBI sting. His trial is to start April 7.

Defense lawyers want the government to disclose if it used enhanced surveillance to justify its wider investigation of Daoud. If it did, they want to challenge evidence on grounds it violated Daoud’s civil rights against unreasonable searches.