Anybody recall Air France flight 447 that disappeared over the Atlantic, en route to Rio de Janiero in June 2009? It was kind of a big story for a few days, largely due to the mystery involved. Mystery is not nearly as terrorizing to a populace as having an aircraft blown up within their airspace. We are all still guessing at what happened to Air France 447 and we'll probably never know unless the black box miraculously washes up on shore and some passer-by recognizes it as something important. I think that helps to shed some light on why terrorists don't prefer to detonate over the ocean.