Sounds like the start of World War I
If a place as insignificant as Greece (or Serbia in 1914) can set off events that will turn the US and the world economy on its head, then the system is loaded and primed for explosion anyway. Doesn’t matter what the spark is.
Kinda reminds me of the trailer of a Doctor Who episode called, “The End Of Time.”
http://www.youtube.com/watch?v=RcnOtoCTqmo
http://www.youtube.com/watch?v=wT4vieVh4d8
http://www.youtube.com/watch?v=NFoCQSis9uU