Zohreen Shah reports on more than 50 million people bracing for dangerous weather from coast to coast; Perry Russom has the latest security concerns after that second stowaway incident on a Delta flight; Mary Alice Parks has late breaking details on the public clash over IMMIGRATION policy playing out online between Elon Musk and Vivek Ramaswamy and some of president elect Trump's staunchest supporters; and more on tonight's broadcast of World News Tonight.

Steve Osunsami reports on the tributes across America and the world for Fmr. President Jimmy Carter, as flags are lowered to half-staff in his honor; Britt Clennett has the latest from South Korea as the NTSB joins the investigation into the cause of the devastating Jeju Air jet crash that killed 179 people; Aaron Katersky reports as police in New York City are on high alert heading into New Year's Eve, with the NYPD Commissioner promising a "tremendous" law enforcement presence; Elizabeth Schulze has details on the major security breach by China targeting the U.S. Treasury Department; and more on tonight's broadcast of World News Tonight.