IIRC the official line is that it's to prevent destruction of evidence. Personally doesn't seem like a good enough reason to me. (I'm suspicious it's partly to

IIRC the official line is that it's to prevent destruction of evidence. Personally doesn't seem like a good enough reason to me. (I'm suspicious it's partly to help their case by intimidating suspects, give a reason for keeping TAC units budgets high, and b/c the TAC guys think it's fun lol) Especially considering that if you knock down doors in the USA you're bound to get people who shoot back.