Russia has recently unveiled several new nuclear-capable and nuclear-powered weapons that President Vladimir Putin says will be "important for the entire 21st century." CNN's Fred Pleitgen breaks down their capabilities. | CNN International

Venezuela says it is launching a "massive mobilization" of military personnel, weapons and equipment in response to the build-up of US warships and troops in the Caribbean Sea. CNN's Stefano Pozzebon reports from Caracas. Read more: https://cnn.it/3Jszv6k | CNN