Thomas O’CONNOR, Plaintiff-Appellant, v. Louis W. SULLIVAN, Secretary of Health and Human Services, Defendant-Appellee

POSNER, Circuit Judge.

Thomas O’Connor appeals from a decision by the district court upholding the denial by the Social Security Administration of O’Connor’s application for disability benefits. At the time of his hearing before an administrative law judge, O’Connor was 47 years old. He had not worked since the year after one lobe of his left lung was removed as a result of a gunshot wound; until then he had done strenuous unskilled factory work as an assembler and janitor. Besides having lost some pulmonary capacity as a consequence of the lobectomy, O’Connor has diabetes. He is also an…