ukraine accused russia of using the separatist it controls to provoke the ukrainian military into responding with force. thereby, giving russia an excuse to send its troops across the border. >> with all of that is a backdrop, secretary of state, anthony blinken, made an unscheduled stop at the un today, on his way to meet with u.s. allies in germany. he laid out, in stark and chilling detail, how russia might create a pretext for an attack. >> it could be a fabricated so-called terrorist bombing inside russia. the invent of the discovery of a mass grave. a stage drone strike against civilian. even a real attack using chemical weapons. russia may describe this offense as ethnic cleansing, or genocide. making a mockery of the concept that we in this chamber do not take lightly. russian missiles and bombs will drop across ukraine. communications will be jammed.