Would you feel more confident if the we got rid of ours and the US did likewise and the only countries in the world with the weapons were China and Russa?
A deterrent. It's worked for 71 years. Maybe in a few years time there will be something that nullifies it but until then we should keep it.
Your analogy with the US gun laws was ridiculous. In America, people buy guns and shoot people. In this country, you'd be hard pressed to find a...