Russia’s continued military buildup along the Ukraine border has raised fears of invasion. The tension over Ukraine has further deteriorated ties between Russia & NATO members. Russia-NATO ties were once so warm that Moscow was willing to join the alliance. When Vladimir Putin rose to power in 2000, he had expressed interest in joining the NATO alliance. However, in less than two decades, that relationship has gone from bad to worse. Here’s how the Russia-NATO relationship grew bitter over that time period. From CRUX.