After more than 400 days of war, Israel and Hamas have agreed to a ceasefire deal, which will include a hostage-prisoner exchange; Tom Soufi Burridge reports on the reactions from the families of the hostages, and Ian Pannell explains the fragility of the deal, which begins Sunday; Mary Bruce has details on Pres. Biden's final prime time address, bidding farewell to the nation and highlighting accomplishments from his term; Erielle Reshef reports on the FDA ruling to ban Red No. 3 dye, an additive used in a range of products, from America's food and drug supply due to its link to cancer in male lab rats; and more on tonight's broadcast of World News Tonight with David Muir.