Soldier blinded in Iraq is given the ability to see again

The video tutorial discusses various concepts, starting with an introduction to initial thoughts. It then moves on to a discussion about imagery and actions, highlighting key points. The tutorial concludes with final remarks and a summary of the discussed topics.

What does the speaker imply by saying 'of US testing nearly fell over'?

What is the context of Craig's statement about 'they've got the circle there'?