Most security systems.

I don’t like the man’s politics, and I think it’s terrible that he’s been allowed to hold office this long with his deteriorating health.

That said, I also find it so sad to see any person reaching a point where their cognitive abilities are this unpredictably impaired. Sudden freeze-ups and clear moments of detachment remind me too much of my father in-law and conversations I’ve had with him as his dementia develops.