Nvidia led a week of big AI moves, major security threats, app ecosystem changes, and tech industry shakeups across Apple, Google, Meta, Microsoft, and OpenAI.

Add Yahoo as a preferred source to see more of our stories on Google. Savannah Guthrie at Rockefeller Plaza on March 5, and Savannah Guthrie and Nancy Guthrie on the Today show set in 2015. (Photo ...