After watching several cop and FBI shows this week, I noticed that the detectives always rack the slide right after drawing or going into area of conflict. I know these shows have technical advisors from their respective real agencies. Do detectives and agents usually carry in condition 3? I also noticed agent on "Criminal Minds" cocking his revolver before sweeping a house. Is this the accepted procedure? Just curious, I was taught opposite procedures C1(auto) or DAO(revolver).