Military judge throws out testimony from alleged mastermind behind the 9/11 terror attacks

There are only 10 days to go until the 25th anniversary of the devastating, tragic terror attacks on 9/11. In the lead-up to this special anniversary, we're learning that the alleged mastermind behind the attacks won't have his confessions admitted in court.  A military judge has now thrown out the confessions because of how they were obtained. What kind of hurdle could this present to the U.S. government as they try to plead their case?