North Korea’s nuclear test may further damage nonproliferation efforts, as well as complicate ongoing negotiations with Iran to suspend its nuclear program. Much will depend on the response from Mosc…

The UN conference on climate change that begins December 7 in Copenhagen is supposed to produce new targets for emissions reductions, but experts say major countries are at odds on the ultimate goal …

Russia has suspended its participation in a treaty on conventional arms and voiced opposition to a missile shield in its backyard. Is a new era of mutual hostility in the making?