AdvertisementWhy Russia-Ukraine tensions have again reached a boiling pointDecember 07, 2021The Associated PressfacebookEmailThis frame from a video released on April 23 by Russian Defense Ministry Press Service shows, Russian troops board landing vessels after drills in Crimea. Ukrainian and Western officials are worried that a Russian military buildup near Ukraine could signal plans by Moscow to invade its ex-Soviet neighbor. (Russian Defense Ministry Press Service via AP)