Hermione's look of shock probably answers that question before her words do. "No! At least,... it's not government sanctioned, is it? We have secret military groups - spies, and such - and many nations try to puff themselves up to look as strong as possible, but it's not as though we have an organized group of assassins just waiting for someone to strike out against our country. At least, not my country. There may well be something like that elsewhere, but I wouldn't be able to say where, since most nations would probably consider such a thing a matter of utmost secrecy."