What should I ask Christopher Kirchhoff?

I will be doing a Conversation with him.  In case you do not know, Christopher self-describes as:

Christopher Kirchhoff is an expert in emerging technology who founded the Pentagon’s Silicon Valley office and has led teams for the President, Chairman of the Joint Chiefs of Staff, and CEO of Google. He recently worked special projects at Anthropic. Previously, Dr. Kirchhoff helped design and scale $1 billion in philanthropic programs at Schmidt Futures. He also founded and led the Pentagon’s Silicon Valley Office, Defense Innovation Unit X, which piloted flying cars and microsatellites in military missions and created a new acquisition pathway for start-ups now responsible for $70 billion dollars of technology acquisition. During the Obama Administration, he was Director for Strategic Planning at the National Security Council and the senior civilian advisor to the Chairman of the Joint Chiefs of Staff.

I very much enjoyed his new book Unit X: How the Pentagon and Silicon Valley are Transforming the Future of War, co-authored with Raj M. Shah.  Here is his home page.  The book just received a very strong review from the FT.

So what should I ask Christopher?