 Complete the following phrase:  On 2223 February 2014, Russian President Vladimir Putin convened an all-night meeting with security service chiefs to discuss the extrication of the deposed Ukrainian president, Viktor Yanukovych. At the end of the meeting, Putin remarked that we must start working on returning Crimea to Russia. On 23 February, pro-Russian demonstrations were held in the Crimean city of Sevastopol. On 27 February, masked Russian troops without insignia took over the Supreme Council parliament of Crimea and captured strategic sites across Crimea, which led to the installation of the pro-Russian Sergey Aksyonov government in Crimea, the conducting of the 