> 21 feet is often quoted as the minimum distance where a gun wins over a knife Against an already drawn gun and a trained as well as attentive officer? Do you

> 21 feet is often quoted as the minimum distance where a gun wins over a knife Against an already drawn gun and a trained as well as attentive officer? Do you have a source for that? I have a hard time believing that. Or is this the case after factoring into the US mentality of "there may not ever be any residual risk for a cop"?