evidence: Secretary of State Antony Blinken and Secretary of Defense Lloyd Austin slipped into Ukraine on Sunday for an extraordinary wartime meeting with President Volodymyr Zelenskyy, bringing new promises of military and diplomatic support and defying grave concerns about whether it was safe to make the journey. [...] While in Kyiv, Blinken also informed Zelenskyy that U.S. diplomats will return to Ukraine this week — possibly as early as Monday — for the first time since the U.S. evacuated its remaining diplomats in the country to Poland weeks ago, a senior State Department official said. At first, U.S. diplomats temporarily based in Poland will make day trips over the border to the Ukrainian city of Lviv and then to other parts of the country, the official said. [...] Blinken also told the Ukrainians the U.S. will provide another $713 million in military financing for Ukraine and other regional partners, the official said, including assistance for Ukraine to transition from old, Soviet-era weapons to more modern systems used by NATO members.