This week "Sunday Morning," with guest host Mo Rocca, features David Martin's story on the history behind a new aircraft carrier's name. Plus: Anthony Mason sits down with the British band Mumford & Sons; Tracy Smith talks with Oscar-nominated actress Laura Dern ("Marriage Story"); Lee Cowan learns how a long-forgotten tool for treating suicidal patients is finding new success; Kelefa Sanneh digs into one Chinese family's connective tradition of cooking dumplings; and Barry Petersen visits the Denver Art Museum's comprehensive retrospective of works by Impressionist artist Claude Monet. Air Date: Jan 19, 2020