I don't think Trump is there yet since he I believe he left in the afternoon, and the flight is so long. This says he gets in tomorrow morning:
"Trump, who departed the U.S. Monday afternoon for the long flight, will meet with Kim on Feb. 27 and 28. Trump will arrive in the Vietnamese capital on Tuesday morning eastern time.
Trump will make the nearly 20-hour trip on Air Force One; Kim, meanwhile, arrived by his preferred method of travel: train."
abc7news.com/kim-jong-un-arrives-in-vietnam-ahead-of-2nd-summit-with-president-trump/5156846/