The FAA has developed a comprehensive set of rules and regulations that govern the operation of drones and other aircraft in the United States. These rules and regulations are designed to ensure the safety of people and property on the ground, as well as the safety of the pilots and passengers on board the aircraft.

Many of these rules and regulations were developed in response to accidents and incidents that occurred in the past. The FAA conducts thorough investigations into each accident or incident involving aircraft, and uses the information gathered to identify the root causes of the accident or incident.

The FAA then uses this information to develop new rules and regulations, or to modify existing rules, to address the issues that led to the accident or incident. For example, if an accident was caused by a pilot's failure to follow proper procedures during takeoff or landing, the FAA may develop new rules or guidelines for pilot training and certification to ensure that pilots are properly trained and understand their responsibilities.

Similarly, if an accident was caused by a technical issue with an aircraft or drone, the FAA may develop new regulations or requirements for manufacturers to ensure that their products meet certain safety standards.

Most importantly the FAA rules and regulations are designed to promote safe and responsible operation of aircraft and drones, and many of these rules and regulations are based on lessons learned from past accidents and incidents. By learning from past mistakes, the FAA can help prevent future accidents and ensure the safety of all those involved in aviation.

The FAA has a principle known as the "Swiss Cheese Model"

The FAA principle known as the "Swiss Cheese Model" suggests accidents are the result of a chain of events or factors that line up, much like the holes in Swiss cheese. This model assumes that accidents occur due to multiple factors, rather than a single cause.

In this model, each slice of cheese represents a layer of safety measures, and the holes in each slice represent potential hazards or weaknesses in the system. When multiple holes align, the chain of safety measures is breached, and an accident can occur.

The FAA has not specifically said that no accident can occur without two things going wrong, but rather emphasizes the importance of identifying and addressing all potential hazards and weaknesses in the system to prevent accidents from happening. By using the Swiss Cheese Model, the FAA emphasizes that accidents can be prevented by implementing multiple layers of safety measures to minimize the likelihood of hazards lining up and causing an accident.