This is new. I recorded it today. No pictures, but it's only a minute and a half and that's half as long as the warning you'd get in the event of a nuclear attack. So, in theory, you could listen to this and still have another minute and a half spare if such a warning was given out.
I don't think they would give a warning though, so be prepared!
http://www.chattonheath.moonfruit.com/#/audiosketches/4529998816