5H

Should they destroy the crystals or was liberating them and passing them onto the Americans a good idea?

ideally, they should be destroyed so that no one nation has that much power. I wouldn't be surprised if we see them in Cabrillo's cabin safe in the next book.

They should be destroyed. No one should have that kind of power.

I agree with >3 Olivermagnus:...No one anywhere in the world should have that kind of power. But since we have them >1 Andrew-theQM: we'll be very careful with them. We'll give them to Oliver to guard. Paint them brown and they'll look like big dog bones.

I think destroying them would be best so nobody can get their hands on them again.

Best to destroy them - even the supercomputer said to do that.