Ukraine's president Petro Poroshenko has called on Mark Zuckerberg to open a Facebook office in Ukraine, addressing him on Facebook in a manner rather unorthodox for a leader of a post-Soviet country.
The Hollywood Reporter: Ukrainian president implores Mark Zuckerberg to open Facebook office in the country

Facebook CEO Mark Zuckerberg speaks at the F8 summit in San Francisco, California, on March 25, 2015.