Millions under threat of strong tornadoes and violent winds as storm danger increases Friday

An incredibly dangerous day of severe thunderstorms including the potential for long-lasting, powerful tornadoes and hurricane-strength wind gusts is ahead for the eastern half of the United States Friday.

​ An incredibly dangerous day of severe thunderstorms including the potential for long-lasting, powerful tornadoes and hurricane-strength wind gusts is ahead for the eastern half of the United States Friday. Read More Breaking News, Latest News and Videos | CNN