Outraged that corporate lobbyists are defending the right of employers to poison their own workers, worker safety advocates will deliver a crucial message to the blue suits at the U.S. Chamber of Commerce today: “Stop blocking OSHA’s new silica rule.” Silica dust is a widespread hazard in many industries, where exposure can be fatal. Four years ago, the U.S. Occupational Safety and Health Administration proposed a new rule that could save as many as 700 lives a year. But employers, led by the U.S. Chamber, are claiming companies can’t “afford” to protect workers. The National Council for Occupational Safety and Health (National COSH) is sponsoring today’s demonstration at 12:15p at the U.S. Chamber of Commerce.