‘Spanish.’

Joseph nodded gratefully at being saved the trouble of speaking the word.

‘Dr Joseph Olivera … you’re arguably one of the most knowledgeable people on genetically imprinted artificial intelligence.’

Be confident, Joseph.

‘I am.’

‘It seems you’ve done very impressive work for some leading military contractors. Working on genetically engineered combat units being trialled right now by the US military?’

‘Right.’

‘And … it says here that you are a firm supporter of the anti-time-travel movement?’

‘I am.’

Waldstein sat forward, his eyes unblinkingly on his. ‘I’d like you to tell me why.’

Waldstein was testing him.

‘Anyone with a s-s-scientific background under-s-stands this. Temporal dis-s-s … s …’ Joseph abandoned the word. He took a breath to steady his nerves, to settle his stammer.

‘Time travel … theory is potentially the most lethal technology ever invented. Theoretically, it has the kinetic energy to be the end of, well … of everything.’

Waldstein said nothing. He obviously wanted to hear more from him.

‘I believe, Mr Waldstein, very much s-so, that there are s-s-some things that should never be fooled around with. In the pursuit of knowledge … there are s-some doors that should remain firmly closed. If there is a God … IF there is a God, then this technology, this knowledge should be for Him, and Him alone. I believe this.’

He paused and realized the next thing he was planning on saying would be tremendously stupid. Hadn’t that pilot specifically warned him not to mention this?

And now I am going to do just that?

His heart flipped in his chest. ‘What you did, what happened in Chicago in ’44, was very dangerous. But all that you have done s-since that, Mr Waldstein, has been the right thing. I believe your campaign to prevent further experimentation is all, literally all, that s-s-stands between mankind and …’ Joseph spread his hands as he fumbled to finish. What word to use? What word?