FILE - Environmental cleanup specialists work at one of the last remaining residential asbestos cleanup sites in Libby, Montana, in mid-September. BNSF Railway attorneys are expected to argue before jurors Friday, April 19, 2024, that the railroad should not be held liable for the lung cancer deaths of two former residents of the asbestos-contaminated Montana town, one of the deadliest sites in the federal Superfund pollution program. (Kurt Wilson/The Missoulian via AP, File)