Gap Sweatshop Workers to Confront Gap Shareholders on Friday at Annual Meeting in Albuquerque With New Evidence of Labor Abuses - Employee at Gap Factory in Lesotho Stabbed by Plant Manager while Protesting Conditions; She Was Scheduled to Attend Shareholder Meeting, but U.S. State Dept. Denies Visa and Muzzles Worker Voice Against Large U.S. Retailer [refers to El Salvador and Guatemala]