Ukrainian President Volodymyr Zelenskyy is replacing his defense minister. Russian President Vladimir Putin will meet his Turkish counterpart to revive the suspended grain deal. And Americans have the day off to celebrate Labor Day. Want more comprehensive analysis of the most important news of the day, plus a little fun? Subscribe to the Up First newsletter.Today's episode of Up First was edited by Rafael Nam, Mark Katkov and Peter Granitz. It was produced by Shelby Hawkins, Chad Campbell, Taylor Haney and Ziad Buchh. We get engineering support from Carleigh Strange . And our technical director is Neisha Heinis.