Which of the following is NOT a purpose of drug testing?

Fitness evaluation is not a purpose of drug testing. Drug testing primarily aims to ensure the safety and readiness of service members, to deter substance abuse, and to promote a healthy environment. It serves specific functions like identifying substance use that could impair a service member's performance or jeopardize unit cohesion and safety.

Inspection random and medical examination are directly related to identifying unfit conditions or substances affecting individuals, while rehabilitation focuses on helping those who may have substance abuse issues. On the other hand, fitness evaluation pertains to assessing a person's physical abilities and overall health rather than their drug usage status. Therefore, it falls outside the scope of the objectives of drug testing in a military context.