Manhunt for suspected shooter of UnitedHealthcare CEO in third day; Judge drops most serious charge against suspect in subway chokehold death; After a week of snow, yet more for the Great Lakes region; and more on tonight's broadcast.

Rebels take control of Syria, Assad flees country; New photos of a person of interest in CEO murder as manhunt widens; President-elect Trump speaks exclusively with NBC News' Kristen Welker; and more on tonight's broadcast.