The Ukrainian capital was in a tight security lockdown with traffic halted on some streets.
In a speech, Mr Biden commended Ukraine’s courage in the war and noted that he had visited Kyiv six times during his time as US vice-president.
“I knew I would be back,” he said.
“When Putin launched his invasion nearly one year ago, he thought Ukraine was weak and the West was divided. He thought he could outlast us. But he was dead wrong,” Mr Biden added, praising Ukrainians for their bravery in resisting Russia’s invasion.
“Kyiv has captured a part of my heart… The cost that Ukraine has had to pay is extraordinarily high. Sacrifices have been far too great.”
Wearing a tie striped in the colours of Ukraine’s blue and yellow flag, the US president promised a further US$500 million (S$670 million) worth of weaponry, including artillery ammunition, anti-armour systems and air defence radars, plus tighter sanctions on Russia.
Mr Biden said the package would be announced on Tuesday, and that Washington would also provide more ammunition for high mobility artillery rocket systems, or Himars, in Ukraine’s possession.
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