956 undocumented immigrants arrested in 24 hours as crackdown intensifies. Trump signs executive actions, one calling for an "iron dome" defense system for U.S. China-based AI app sends triggers biggest one-day U.S. stock loss ever. Rare bird flu strain detected in California as egg prices soar. Cross-country storm that soaked SoCal expected to hit Northeast by end of week. 300,000+ Palestinians return to Northern Gaza for first time in more than a year. Holocaust survivor Tova Friedman speaks to world leaders 80 years after liberation of Auschwitz. 3.8 magnitude earthquake strikes off coast of Maine.  Authorities investigating after fatal accident on tarmac in North Carolina. Kansas City Chiefs and Philadelphia Eagles set to face off in Super Bowl.