I'd forget my head if it weren't for my neck...
Around the time we were initially discussing a vacation to Greece, a little volcano by the name of Eyjafjallajokull was closing air space all over Europe. Add that to the problems Greece has by itself--economy cratering, protests leading to fires and deaths, strikes, the annual summer wildfires, plague of frogs--and I was as nervous then about traveling to Greece myself as I am now about John traveling to Russia in a couple of weeks alone. (Well, with a group of linguists, but not with me.)
Google's ads are tempting him, though. Every time I am around when he checks his email, he informs me of the latest travel specials--Crete! London! Berlin!
We just found out that our friends are staying in Switzerland one more year, though, so I think the weekend trip we had been planning could easily be expanded to include a visit to them and a bit of a vacation to boot.