Episode 312

Matt Rivers has the latest on the two major storms sweeping across the U.S. – bringing heavy snow to the Midwest, severe weather to the South and rain to the Northeast, and Ginger Zee has the Thanksgiving week forecast; Rachel Scott reports on the FBI's request to interview six Democratic lawmakers who recorded a video urging troops to refuse illegal orders; After signing up to become a bone marrow donor, ABC News' Trevor Ault shares his personal journey to donate stem cells for a patient in need of a transplant; and more on tonight's broadcast of World News Tonight with David Muir.