Actually, no. Most countries do not have subs quiet enough to sneak up on US shores. Most countries don't even have submarines, and most of those that do are diesel based, not nuclear, hence they're quite loud. A really careful captain, with the most current maps of our sonar bouys and ships, could probably manage to sneak close enough to get a short range missile or two launched, but they would not have the kind of volume that we do. This assumes, of course, that we didn't happen to have a Los Angeles-class sub lurking somewhere that picked them up, and wiped them out before they even knew they were being stalked. Seriously, the US Navy so vastly outclasses everyone else in the world that you can't even begin to make the comparison.