"President Vladimir Putin's favorite nationalist biker gang, the Night Wolves, flew their flag aboard the International Space Station a $150 billion project co-managed by the U.S. and Russian space agencies. A photo of the group's flag appeared on Twitter on Wednesday, when it was posted by an unverified account apparently owned by the gang's controversial figurehead, Alexander Zaldostanov known to his friends, and even Putin himself, as "the Surgeon."
Night Wolves, Wikipedia
"Members of the Night Wolves have fought on the side of pro-Russian militants during the Crimean Crisis and war in Donbass. They have blockaded the main routes into Sevastopol and participated in attacks on a natural gas facility and the naval headquarters in the city. In April 2015, Agence France-Presse stated that Alexei Vereshchyagin had fought against Ukrainian government forces in Luhansk."