1. you need to ask US consulate in the city near you.
2. Of course they should go with you, otherwise they will stay in Germany alone?? Your American boss knows visa thing better than you do? Not likely. Only very few countries in the world such as China (excluding HK and Taiwan) that a US citizen need visa to visit.
2. Of course they should go with you, otherwise they will stay in Germany alone?? Your American boss knows visa thing better than you do? Not likely. Only very few countries in the world such as China (excluding HK and Taiwan) that a US citizen need visa to visit.