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Boris Johnson warned President Putin that invading Ukraine would be a “disastrous step”, as European allies held talks with President Joe Biden and Nato leaders to decide their next step. 

Nato is putting forces on standby and sending fighter jets and ships to eastern Europe, insisting the alliance will “always do what is necessary to protect and defend all our allies”. 

What’s next for the man ninth in line to the British throne?

He might be 90 years old, but the notorious American boxing promoter Don King is putting on a championship fight night in Ohio next week, declaring: “I will slow down when I go to heaven.”

We spoke to Bill Browder, a financier who invested in Russian business, later to be targeted by the government there.

With the tense stand-off between Russia and the West over Ukraine, and the US and its allies threatening even tougher sanctions, the impact of all this isn’t just hurting Moscow. 

Psychologist Adam Grant has written about the culture of learning and how to encourage people to question their basic assumptions and embrace new ideas.

We spoke to Kusti Salm, secretary general of the Estonian defence ministry, and Anthony Gardner, who was the US ambassador to the European Union.  

“Frank and substantive”, according to the Americans, “open and useful”, according to the Russians, after further talks today over Ukraine. 

The FBI is working with UK counter terror police after a British man flew to the US, bought a gun and held several people hostage in a synagogue.

Gloria Allred is a lawyer who represents many of Jeffrey Epstein’s victims – although not Virginia Giuffre, who is involved in this specific court case. She spoke to us from Los Angeles.

Royal commentator Peter Hunt spoke to us from London.

Surgeons in America have transplanted the heart of a pig into a human patient.

Lin-Manuel Miranda speaks to Krishnan about Jonathan Larson’s influence on him as a writer, the Hamilton years and how he sees America now.

We spoke to Democratic Congresswoman Debbie Dingell, who was inside the House of Representatives when the mob stormed the Capitol building.