Mealey's (November 19, 2018, 9:42 AM EST) -- WASHINGTON, D.C. — Vocational experts at Social Security disability proceedings must substantiate their opinions when asked to provide the mandated “substantial evidence” of job availability, a claimant tells the U.S. Supreme Court in a Nov. 14 reply brief on the merits (Michael J. Biestek v. Nancy A. Berryhill, No. 17-1184, U.S. Sup.)....