The United States is suspending trade preferences for Bangladesh, citing concerns about safety and labor violations in the Bangladeshi garment industry. The move follows a wave of public campaigning spurred by the factory collapse that killed more than 1,100 garment workers in April and a fire that killed 112 last November. On Saturday, activists are gathering in New York City’s Petrosino Square to pressure major retailers that have refused to sign on to a safety accord for Bangladeshi factories making their products. The targeted companies include the Gap, Target and Wal-Mart.