Boris Babin, a scientific advisor to Barristers JSC and former representative of the President of Ukraine in Crimea, told *Apostrophe* why the annexation of Crimea does not mark the end of Russian aggression in Ukraine.

• Why does Russia need to control key areas of the Black and Azov Seas right now?
• And why do Ukrainian authorities need to develop responses to these challenges now?

Apostrophe is a socio-political online publication launched in August 2014 that provides timely coverage and analysis of the most pressing events in politics, the economy, society, and culture.