not the usual enhancement, but rather qualitative enhancement - above all through the strategic nuclear forces.

VOA: standard.2009.03.20

"It slashed U.S.and Russian strategic nuclear forces from 1990 levels of about 10,000 deployed strategic warheads each down to approximately 6,000 by the year 2001,"

VOA: standard.2009.12.07

And we agreed that NATO should be prepared to considered reciprocal reductions in non-strategic nuclear forces deployed in Europe.

WHITEHOUSE: Press Briefing on NATO Defense Capabilities

While operationally deployed strategic nuclear forces are being reduced in number, the U.S. will continue to maintain a responsive force to remain prepared for any immediate or unexpected contingencies.

CENTERFORSECURITYPOLICY: US Nuclear Stockpile

"Russia will have the right to opt out of the treaty if qualitative and quantitative parameters of the U.S. strategic missile defense begin to significantly effect the efficiency of Russian strategic nuclear forces, " Mr. Lavrov told the AP.

WSJ: U.S. Keeps First-Strike Nuclear Strategy