WARSAW (Reuters) - U.S. Vice President Joe Biden told NATO allies in eastern Europe on Tuesday that the alliance was unwavering in its commitment to protect them from attack, offering reassurance after what he called Russia's "land grab" in Ukraine's Crimea peninsula.
Biden was in the Polish capital at the start of a two-day mission to demonstrate to countries on Russia's western borders, nervous they could be next in line after Crimea, that the United States stands by them.
