evidence: Secretary of State Antony Blinken, visiting Kyiv, vows unwavering US support for Ukraine as Russian attacks intensify The United States will stand by Ukraine until its security sovereignty is guaranteed, Secretary of State Antony Blinken pledged on Tuesday during a visit to Kyiv, as Russia mounted fresh attacks in the country's east. [...] Mr Blinken arrived in Kyiv by train early on Tuesday morning for the previously undisclosed visit, which comes days after Russia launched a ground incursion into the north of the region of Kharkiv, opening a new front and stretching Ukraine's soldiers.