I see. Well then that is a practice I honestly don't understand and approve of. Like in a lot of countries it is very common to have a more than ever required number of additional teams and many countries, including the US and the UK even active reserves. It is better to focus all attention and summs on primary cadres' training, upkeep and recruitment - the premise with those units in particular is surgical precision, not strenght in numbers. Everything else can be covered by special police squads that get anti terror training.