A U.S. government official on Wednesday called Russia's claim of a partial troop withdrawal near Ukraine "false," shrugging off any optimism about a de-escalation of the massive Russian military buildup near Ukraine that has raised fears of an invasion.In the last several days, Russia has increased its military presence by as many as 7,000 troops, the official said, adding that some even arrived on Wednesday.The official also said Russia's recently expressed readiness to engage in diplomacy can be seen as a pretense."Every indication we have now is they mean only to publicly offer to talk, …READ FULL ARTICLE