My wife is currently stranded in Germany. As much as I miss her and want her home, there's no way I'd want her to fly through a potential ash cloud given that

My wife is currently stranded in Germany. As much as I miss her and want her home, there's no way I'd want her to fly through a potential ash cloud given that it doesn't show up on radar and the high risk of engine failure when you're over the North Atlantic doesn't sound like a good plan. A couple short range test flights do not mean it's safe to fly trans-Atlantic routes. When you're 40,000 feet up over freezing waters, you need to play it safe.