Take a look at this:

US Navy Sub Trades Nukes For SEALS

Essentially, the four oldest of the U.S. Navy's Ohio-class ballistic missile submarines are now being converted from carrying nuclear ballistic missiles to carrying up to 154 conventionally-armed long-range Tomahawk cruise-missiles, as well as up to 66 U.S. Navy SEALS. The USS Ohio, the subject of this article, is the first such submarine to have this done, and she's now basically become a 'Black Ops' submarine.

More Info: Wiki Article

Well, that's better than their previous uses.

I agree. As SSBN's, all they did was cruise around in areas, then go somewhere's else and cruise around too. Now they get to do some real work as SSGNs.

Why the hell do they even need nukes, they got weapons that can wipe out all of the electronics in a given area, thats a lot more safer then vaporizing and contaminating a goddamn country