Why do police officers need to be tazed

The officers get tased because they can argue that they know what it "feels" like to be tased (if excessive force is used). Secondly, they have to familiarize themselves with the instrument they will be using and not all scenarios require that instrument. Another reason why they get tased, it entails the capabilities of the Taser, and so forth. Consequently, some departments do not require being tased.

Explanation:

counter-terrorism incorporates the practice, military tactics, techniques, and strategy that government, military, law enforcement, business, and intelligence agencies use to combat or prevent terrorism.

basically prevent, pursue, protect, and prepare, google it if you need more info