Joseph M. Billy was an employee of the USM Corporation (USM), a publicly held corporation. Billy was at work when a 4,600-pound ram from a vertical boring mill broke loose and crushed him to death. Billy’s widow sued, alleging that the accident was caused by certain defects in the manufacture and design of the vertical boring mill and the two moving parts directly in the manufacture and design of the vertical boring mil and the two moving parts directly involved in the accident, a metal lifting arm and the 4,600-pound ram. If Mrs. Billy’s suit is successful, can the shareholders of USM be held personally liable for any judgment against USM?