CLEAN : Memorial ceremony at balloon

The transcript features a message from the ambassador of Japan addressing a recent accident. It highlights the responsibility and commitment to investigate the incident thoroughly. The impact on Egypt, particularly its tourism sector, is discussed, emphasizing the importance of support. The message concludes with condolences to those affected by the tragedy.

What does the speaker mean by 'unprecedented' in the context of the incident?

What are the main concerns expressed by the speaker?