Where an administrative law judge did not abuse his discretion by declining to grant a claimant’s subpoena for the vocational expert’s sources.The 7th U.S. Circuit Court of Appeals reversed a decision by U.S. District Magistrate Judge Nancy Joseph, Eastern District of Wisconsin.Joseph Krell, a former ironworker in Wisconsin applied for disability benefits due to problems with one of his knees. His application was initially denied and again on reconsideration. Krell then requested a hearing before an …