Everyone involved in laboratory operations – from the highest administrative level to the individual workers – must be safety minded. Safety awareness can become part of everyone’s habits only if senior and responsible staff demonstrates a sincere and continuing interest in safety, and discusses it repeatedly. Over-familiarity with a particular laboratory operation may result in overlooking or underrating its hazards. This attitude can lead to a false sense of security, which frequently results in carelessness. Be alert to unsafe conditions and actions and call attention to them so that one can make corrections as soon as possible. Every laboratory worker has a basic responsibility to himself/herself and colleagues to plan and execute laboratory operations in a safe manner.