In pics: Russian cosmonauts celebrate Putin's Luhansk victory at Space Station

• Russian cosmonauts aboard the International Space Station on Monday celebrated Russia's capture of the eastern Ukrainian region of Luhansk, a significant milestone for Moscow in the war. Roscosmos, the Russian space agency, described Moscow's capture of the Luhansk region as "a liberation day to celebrate both on Earth and in space' The agency posted pictures of cosmonauts Oleg Artemyev, Denis Matveev and Sergei Korsakov smiling as they held up flags of Russia's proxies in eastern Ukraine, the self-proclaimed Luhansk People's Republic. Watch this video for more.