烏克蘭總統澤連斯基：我們原本希望與美國達成首份無人機協議。美方希望測試我們所有類型的無人機。我們同意按照他們提出的方式，對我們的系統進行測試、訓練和使用，包括在空中、陸地和海上環境中的應用。

The expedition ship Hondius, which earlier had a fatal hantavirus outbreak, was declared virus-free after comprehensive cleaning and inspection and has been cleared to resume operations, Dutch operator Oceanwide Expeditions said on May 31. The company expects to restart scheduled sailings on June 13; the next voyage will depart Longyearbyen, Spitsbergen, and transit islands in the northern archipelago.

President Trump said the US will continue to advance strategic cooperation with the Syrian and Iraqi governments and that ties with them will deepen.