Attorney General Merrick Garland will undergo back surgery this weekend and delegate his duties to the deputy attorney general during the procedure, the Justice Department said Monday. The news comes as Defense Secretary Lloyd Austin returns to work at the Pentagon following a hospitalization related to prostate cancer that was criticized for being kept secret for days. Garland, 71, will be under general anesthesia during the back procedure on Saturday, which will last about 90 minutes and is “m