Many consider the patriot act to be a threat to the US and many, many people are worried about it. The Patriot Act was passed by congress and not a national referendum so we Americans didn't have much to say the in the matter.![]()
The 2nd Amendment and militia doesn't apply solely to foreign threats. See Hurricane Katrina for instance.
Also there have been recent court rulings in the past few years that 2nd amendment doesn't protect militias but individuals.
So the 2nd Amendment is still valid and useful in my opinion as recent events and court rulings have shown.