**Deadly U.S. Storm Swarm Marches East, Threatens Millions**

A powerful system of severe storms is moving east after battering the central United States for days. It now poses a new threat to millions of Americans. The storms caused significant damage across central states, producing multiple tornadoes and large hail. On Tuesday, the system began its advance toward the eastern U.S. Meteorologists warn the eastward shift could trigger another major outbreak of tornadoes. The severe weather also brings a continued risk of destructive hail and damaging winds. Rob Marciano is tracking the storm system's path and developing threats.