US president Joe Biden,78, had an oops moment at the end of his news conference on Tuesday after his first summit with Russia’s Vladimir Putin. The US president briefly lost his cool and snapped at a reporter who asked him a question, which seemed off-track to Biden. He, however, apologised for his behaviour soon after.

“Why are you so confident [Putin] will change his behavior, Mr. President?” CNN’s Kaitlan Collins had asked. Biden, who looked seemingly irritated, walked back toward the reporters while wagging his finger and said, “I’m not confident he’ll change his behavior. Where the hell — what do you do all the time? When did I say I was confident?”

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“What will change their behavior is if the rest of the world reacts to them and it diminishes their standing in the world. I’m not confident of anything; I’m just stating a fact,” Biden told the reporter

The reporter continued with his question highlighting that Putin’s past behavior “has not changed”.

“In that press conference, after sitting down with you for several hours, he denied any involvement in cyber attacks; he downplayed human rights abuses; he even refused to say Alexei Navalny’s name. So how does that account to a constructive meeting?” Collins said.

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In response to this, Biden said, “If you don’t understand that, you’re in the wrong business.” The conference ended after this.

Biden, just before boarding the Air Force One at the Geneva Airport, apologised for his behaviour. He told the reporters, “I shouldn’t have been such a wise guy with the last answer I gave. I owe my last question an apology. You never ask positive questions.”

President Joe Biden said on Wednesday that discussions in his first summit with Vladimir Putin were “positive”, but warned his Russian counterpart that Washington would not tolerate interference in US democracy.