Linking History to Modern Security

In his first interview since leaving the White House, Joe Biden accused the Trump administration of "modern-day appeasement" in pressuring Ukraine to give up territory to Russia.

He also spoke about his ill-fated presidential campaign last year that saw him eventually drop out the race against Donald Trump, saying it "wouldn't have mattered" if he had dropped out of the race earlier. The White House said that Joe Biden was a "complete disgrace" in response to the interview.

It's unusual for former presidents to speak about their successors, so why has Biden chosen to speak now, and what were the things he didn't reveal?

Adam and Justin sit down with the BBC'S Nick Robinson to unpack his interview with the former president.