On Tuesday, the Obama admin istration released its new nu clear strategy; today, the prez will ink a new nuke treaty with the Russians in Prague. Next week, he'll host an all-world atomic affair in Washington. It's a veritable "no-nukes-palooza." Problem is, not all nuclear cutbacks are wise. Next week's DC summit makes sense: It's focused on securing nuclear materials -- making it harder, for example, for terrorists to acquire an A-bomb. But the other two "events" raise serious concerns. The new nuclear strategy aims to create a smaller nuclear force. But that force is already aging, and thus growing...