The defense team for U.S. Army whistleblower Bradley Manning has opened its case in the sentencing phase of his court-martial after government prosecutors concluded their case on Friday. Defense lawyers began by questioning the decision by Manning’s superiors to maintain Manning’s top-secret security clearance despite signs of mental distress, including one incident where he flipped over a table. Manning is expected to testify either today or Wednesday before the defense wraps. He is facing up to 90 years in prison for giving troves of documents to WikiLeaks.