In the news

Yes of course. There is nothing* to stop them, for example, building a small navy in a safe haven in Afghanistan and then sailing over here, up the Thames ** and attacking London.

*other than it's landlocked

**must make sure they can get under that Tower bridge as I doubt they'll open it for them

This reminds me of one of John Bird's parodies of Idi Amin on the Ugandan Navy.

"America gonna have bring the aircraft carrier in by air."

http://www.youtube.com/watch?v=e99dv3aKk3M