Washington (AFP) – The United States said Thursday that Russia is on the verge of unleashing a massive military attack against Ukraine, dismissing Moscow’s claim to be pulling forces back, as artillery fire hit a Ukrainian kindergarten. In a dramatic, previously unscheduled speech to the United Nations in New York, US Secretary of State Antony Blinken said intelligence showed Moscow could order an assault on its neighbor in the “coming days.” With US and other Western governments saying they see no evidence to support Russia’s claim to be withdrawing, Blinken challenged the Kremlin to “announ…