[1/3] President Joe Biden arrives for a surprise visit with Ukrainian President Volodymyr Zelenskiy, Monday, Feb. 20, 2023, in Kyiv.
After months of planning, Biden on Friday decided to go ahead with the trip, according to the White House.
By then it was Sunday night, and Biden's train traveled in the dark with a heavy security presence on board.
"It's good to be back in Kyiv," Biden said after stepping off the train.
U.S. national security adviser Jake Sullivan, who accompanied the president, said U.S. officials did notify Russian officials that Biden would be traveling to Kyiv.