Winter blast threatens busiest travel day of the year; 4 killed, 11 injured in shooting during California birthday party; ...

Likely tornado rips through Houston area; Federal judge tosses charges against James Comey and Letitia James; Pentagon opens misconduct investigation into Arizona democratic Senator Mark Kelly; and ...

NBC News is betting on 'Nightly News' anchor Tom Llamas to woo critical viewers from ABC News 'World News Tonight' in an era ...