Remains belonging to one of the biggest birds that ever lived have been discovered in a cave in Crimea.
One military expert said Crimea is "bristling with missiles like a hedgehog."
"It is too early to talk about President Putin's offering his congratulations to Zelensky, as well as speaking about the possibilities of working together," a Kremlin spokesperson said about comedian-actor Volodymyr Zelensky, Ukraine's new president.
"This is a sure sign of your successful work in Russia," Russian President Vladimir Putin told a director from the country's Ministry of Energy.
The Trump administration recently announced that it would pull out of the INF treaty, which was signed between the U.S. and the Soviet Union in 1987.
Months after Russia seized three Ukrainian navy ships in the Sea of Azov, the project is more relevant than ever.
"We know that we can only solve things through being reasonable and through dialogue," the German chancellor said.
The S-400 system is considered the most advanced in the world.
Ukrainian President Petro Poroshenko said that the number of Russia forces at the border had "grown dramatically."
The men were captured during a violent confrontation with Russian navy ships on Sunday.
Angry anti-Russian demonstrators set fires and threw smoke bombs and flares outside the compound.
The group had a novel solution to a pedestrian ban.
"That was President Obama's regime. That was during President Obama, right?" Trump said.
Around 50,000 troops, 65 vessels, 150 aircraft and 10,000 vehicles will take part in Trident Juncture 2018.
The Russian government hit back on sanctions by taking Western cheese, fruit and foodstuffs, only to bulldozer them at the border.
Since Russia's annexation of Crimea in 2014, the question of where Ukrainians go to worship has become a political issue.
The Kremlin leader allegedly revealed the news during a closed-door speech on Thursday with top Russian ambassadors.
Pussy Riot's protest demands included: "Let all political prisoners free."