Zelensky asks Biden why Ukraine still not in NATO
In an interview with HBO's documentary news programme Axios, Zelensky said that if he had a chance to ask the US president a question, he would focus on Ukraine's relationship with the US-led military alliance.
"I have a very simple question: Mr. President, why are we still not in NATO?"
The 43-year-old president spoke to HBO on January 23 and the full transcript of the interview was released by his office on Monday.
Since 2014, Kiev has been fighting against Russian-backed separatists in the east of the country in a conflict that has claimed more than 13,000 lives.
Russia can attack "any European country" and even the United States, Zelensky said, adding that in the east Ukraine's army was defending Europeans, not just Ukrainians.
Ukraine's pro-Western leadership closely cooperates with NATO and in 2019, the ex-Soviet country adopted constitutional changes spelling out its aspirations to join the military alliance as well as the European Union.
Kiev sees NATO accession as a key way to bolster its defences against Moscow, which has accused the alliance of seeking to make inroads in its traditional sphere of influence.
Trump's administration published the transcript of a controversial phone call between Trump and Zelensky in 2019.
Asked if he was "a little bit" angry with Trump, Zelensky quipped: "A little bit?" and laughed.
"These are personal things," Zelensky said. "I would have never allowed it."