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

Estonian FM Margus Tsahkna says Russian President Vladimir Putin is testing NATO’s unity but Russia's multiple airspace breaches won't break the alliance's resolve. Watch the full interview here: https://aje.io/Estonia | Al Jazeera English