Interview with Iranian ambassador to the UK on the downing of Ukrainian airliner

The transcript discusses a tragic airplane incident in Tehran, where intelligence agencies claim it was shot down by the Iranian military, possibly by mistake. Tehran authorities deny this, emphasizing the need for expert investigation and evidence. The Iranian government is confident no missile was launched by their military, and they have invited international experts to investigate the incident.

What is the significance of the black box and voice recorder in the investigation?

How does the speaker express confidence in their military's actions?