After last week's Rana Plaza building collapse in Bangladesh, which killed at least 377 garment workers, United Students Against Sweatshops (USAS) started a petition calling on three of the leading users of Bangladeshi garment workers—Walmart, the Gap and H&M—to demand that factories in the country be made safe for workers. The building collapse is already the deadliest garment factory disaster in known history and the death toll is not yet final. USAS says the deaths could have easily been prevented, as cracks appeared in the structure the day before it collapsed. Workers were ordered to work in the building anyway, under threat of losing a month's pay.