Russia's point man for arms control cautioned Donald Trump's incoming administration on Friday against resuming nuclear testing, saying Moscow would keep its own options open amid what he said was Washington's "extremely hostile" stance.

US President-elect Donald Trump has said he’ll quickly negotiate an end to Russia’s war in Ukraine. This has got NATO allies wondering if he’ll withdraw US support for the government in Kyiv and force it to accept a permanent Russian occupation of Ukrainian land.

The U.S. president-elect criticized Ukraine’s use of U.S.-supplied missiles for attacks deep into Russian territory in a Time magazine interview, comments that suggest he could alter U.S. policy towar