CLEAN : Desmond Tutu speaks at the US chamber of commerce's Thanksgiving

The transcript discusses the importance of holding leaders accountable for their actions, expressing gratitude to those involved in the anti-apartheid movement, and appealing for support in building a new South Africa. It highlights the role of Archbishop Tutu and President Madiba in these efforts.

In what context is Archbishop Tutu mentioned in the text?

What does the speaker mean by 'we owe it a very great debt of gratitude'?