In one to two pages, please include the following: Briefly describe the various periods in safety that led to current safety programs. Based on our initial overview of the SMS, which pillar do you think plays the most critical role in an SMS? Why is this pillar important to the success of an aviation program? How could this pillar have positively contributed during previous eras of safety? Be sure to: Use terms associated with aviation safety and program management. Make connections to concepts behind SMS. Relate basic safety management concepts to safety programs