“This is a permanent threat to Ukraine’s territorial integrity because the Black Sea fleet is the outpost of the Russian state in Ukraine,” [protester Igor Derevyanko] was quoted as saying by the Associated Press news agency. – BBC
I kind of hate the fact that I need to point this out, but historically – Crimea wasn’t even a part of Ukraine. I mean, it was part of the Kievan Rus, sure (note the “Rus” in “Kievan Rus”). Most of the people who live there have stronger ties to Russia. There’s nothing weird about that either. It’s just the way it has worked out.