Warren Buffett is celebrating the successes of Berkshire Hathaway’s companies last year and in the 60 years since he took over the company.

After his firm paid $26.8 billion in taxes last year, Warren Buffett told the president to "spend it wisely," adding, "Take care of the many who, for no fault of their own, get the short straws in life.

The billionaire’s annual letter to shareholders praised saving and attacked dividends as usual, but it also contained plenty of advice for the US president.

Rachel Maddow looks at two acts of protest against Donald Trump's attacks on federal workers, one from the peaks of Yosemite National Park, and another that is drawn from the depths of artificial intelligence,