Yes, it’s the “theme”:http://www.totalwonkerr.net/1847/iridium-cosmos of the “week”:http://www.totalwonkerr.net/1849/whats-the-chance.

According to the “BBC’s defense correspondent”:http://news.bbc.co.uk/2/hi/uk_news/7892294.stm, the undersea collision of HMS Vanguard and Le Triomphant was not too likely:

“This is clearly a one-in-a-million chance when you think about how big the Atlantic is,” she said.

Now, clearly that’s a figure of speech rather than a considered estimate. And perhaps it’s one of those probabilities that’s altogether too easy to lowball. As a source explains later in the same item, submarines like to hang around and spend time together:

Nuclear engineer John Large told the BBC that navies often used the same “nesting grounds”.

“Both navies want quiet areas, deep areas, roughly the same distance from their home ports. So you find these station grounds have got quite a few submarines, not only French and Royal Navy but also from Russia and the United States.”

Par-tay.

Here it is, your “musical bonus”:http://www.youtube.com/watch?v=gUG2SQK03tU.