Question: is there a swat team in every city

Answer: No, After the LAPD's establishment of its own SWAT team, many law enforcement agencies across the United States established their own specialized units under various names. Gates explained in his autobiography Chief: My Life in the LAPD that he neither developed SWAT tactics nor the associated and often distinctive equipment; but that he supported the underlying concept, tried to empower his people to develop it, and generally lent them moral support.