What are the odds?

Between Joe and I there are a combined 9 siblings on both sides of our family (including spouses and us). Right now 6 are (or soon to be) out of the country. And they are not traveling all together on the same trip. Okay, so in this particular family the odds of that happening may be greater considering we have both a military family and another family that lives semi-permanently out of this country. But still...