ABC World News Tonight with David Muir S2024E320 - Episode 320

Aaron Katersky has the latest on the manhunt in New York City for a gunman that opened fire and killed UnitedHealthcare CEO Brian Thompson in what police say was a "premeditated, preplanned targeted attack;" Trevor Ault has details on the fast-moving clipper system from Canada that's bringing high winds, causing dangerous blowing snow and low visibility to parts of the upper Midwest, and Lee Goldberg tracks the storm; Pierre Thomas reports on the millions of Americans that could potentially be impacted by a massive Chinese hacking and espionage campaign, the chairman of the Senate Intelligence Committee tells ABC News; and more on tonight's broadcast of World News Tonight with David Muir.