Provide an overview of how CRISPR technology is used for gene editing, including its mechanism, applications, and ethical considerations. Highlight real-world examples where CRISPR has been successfully implemented and discuss potential future breakthroughs.

Specifically, delve into:

* **Mechanism:** Explain how the CRISPR-Cas9 system works to target and modify DNA sequences.
* **Applications:** Discuss the various applications of CRISPR technology in fields like medicine, agriculture, and biotechnology.
* **Ethical Considerations:**  Address the ethical concerns surrounding gene editing, including safety, accessibility, and potential misuse.
* **Real-world Examples:** Provide specific examples of how CRISPR has been used to treat diseases, develop new crops, or advance scientific research.
* **Future Breakthroughs:** Discuss potential future applications of CRISPR, such as correcting genetic defects in embryos, developing new gene therapies, and engineering organisms with enhanced traits. 
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If possible run your optimized version.</strong>