I should hope so, I think all countries deserve the right to protect themselves from an attack.
Natural disasters are a lot trickier, what if an earthquake hit, how can one prepare for that. But in the case of Hurricane Katrina, they should have evacuated everyone quickly.
Also how many hostile nations really have WMD, that can reach the U.S.
Only a handful like China, N.Korea and Russia.
Maybe the Pentagon should worry about the way they use WMD on other civilian areas throughout the world and also convict those who are responsible for usch an act.