Major leadership changes hit tech giants as Tim Cook steps down from Apple and Amazon makes massive AI investment in Anthropic.

Tim Cook will step down as Apple CEO and be replaced by John Ternus, the company's head of hardware engineering.

Amazon plans to invest up to $25 billion in AI company Anthropic, with Anthropic committing $100 billion to Amazon technologies for AI systems.

Four Cabinet and senior officials have stepped down from Trump's administration.

Apple's CEO transition marks another significant leadership change in the company's history of transformative executives like Steve Jobs.