Hi Peter, thank you for your time.
I accidentally ripped my certificate of naturalization in half. How much of a risk is it to keep the halves and not get a new one? New one was $555 last I checked; is there any reprocessing or is it just law of supply/demand?
There's really no need for it. You have a US passport, I assume, which is evidence of your US citizenship and I don't think it's any less valid because it was torn.