Shrug. The article is mostly a tale of two, uh, causes of excitement. It doesn't make a sweeping claim about getting rid of anything.

"continually reduced its nuclear stockpile, or that we've been at the forefront of promoting non-proliferation."

I'm amused. Its easy to promote other people not having weapons :). Its worth noting that the US is still the world's largest nuclear power. The RRW program would have featured replacing every existing weapon, probably the US resuming tests, and it was pretty expenvise - are you really surprised it got cancelled?