Russia says it will stick to New START's nuclear arms limits as long as US does

Russia US Nuclear Treaty - (Russian Defense Ministry Press Service)

Moscow will observe the limits of the last nuclear arms pact with the United States that expired last week as long as it sees that Washington is doing the same, Russia's top diplomat said Wednesday.

The New START treaty expired Feb. 5, leaving no restrictions on the two largest atomic arsenals for the first time in more than a half-century and fueling fears of an unconstrained nuclear arms race.