U.S. Secretary of State Antony Blinken poses for a photo with Ukraine's Prime Minister Denys Shmyhal at the Cabinet of Ministers in Kyiv, Ukraine, Wednesday, Sept. 11, 2024. (AP Photo/Mark Schiefelbein, Pool)

Ukraine's President Volodymyr Zelenskyy prepares to meet U.S. Secretary of State Antony Blinken and Britain's Foreign Secretary David Lammy at the Mariinsky Palace in Kyiv, Ukraine, Wednesday, Sept. 11, 2024. (AP Photo/Mark Schiefelbein, Pool)

U.S. Secretary of State Antony Blinken, second left, meets with Ukraine's Prime Minister Denys Shmyhal, second right, at the Cabinet of Ministers in Kyiv, Ukraine, Wednesday, Sept. 11, 2024. (AP Photo/Mark Schiefelbein, Pool)

U.S. Secretary of State Antony Blinken shakes hands with Ukraine's Prime Minister Denys Shmyhal at the Cabinet of Ministers in Kyiv, Ukraine, Wednesday, Sept. 11, 2024. (AP Photo/Mark Schiefelbein, Pool)

U.S. Secretary of State Antony Blinken arrives for an event to promote civil society engagement in Kyiv, Ukraine, Wednesday, Sept. 11, 2024. (AP Photo/Mark Schiefelbein, Pool)

U.S. Secretary of State Antony Blinken is accompanied by U.S. Ambassador to Ukraine Bridget Brink as he prepares to depart the train station in Kyiv, Ukraine, Wednesday, Sept. 11, 2024. (AP Photo/Mark Schiefelbein, Pool)

U.S. Secretary of State Antony Blinken meets with Ukraine's Prime Minister Denys Shmyhal at the Cabinet of Ministers in Kyiv, Ukraine, Wednesday, Sept. 11, 2024. (AP Photo/Mark Schiefelbein, Pool)

U.S. Secretary of State Antony Blinken and U.S. Ambassador to Ukraine Bridget Brink attend an event to promote civil society engagement in Kyiv, Ukraine, Wednesday, Sept. 11, 2024. (AP Photo/Mark Schiefelbein, Pool)