Door Breach Techniques

There's got to be a andard set of practices here for door breaching going forward. These are the things we're going to have to teach in our police academy, somewhere already doing it. Learn to recognize, just like you would in a first aid situation, certain things i remember first aid secret service. Look at the chest. Is it rising? Listen, is the subject breathing? Feel the pulse with your fingers, not your thumb, your index finger. I remember that was 20 years ago. Now we're going ap to teach people door breaching techniques too.