AKIPRESS.COM - Russia did not show up at meeting planning the 2016 Nuclear Security Summit, U.S and European officials said Monday, in a potentially serious blow to efforts by President Barack Obama to cement his legacy as leaving the world safer from nuclear terrorism than when he took office.

The officials said it was not immediately clear whether Russia’s absence meant that Moscow meant to boycott the summit itself or if it was a temporary show of displeasure over Washington’s harsh condemnation of Moscow’s role in Ukraine unrest and its lead in orchestrating Western sanctions and other punitive measures in response.

The U.S. president initiated a string of summits in 2010 aimed at preventing terrorists from getting their hands on weapons-grade nuclear material. Since then, the number of countries that have enough material to build a nuclear weapon has fallen from 39 to 25, reports Washington Times.

At the last summit this year in The Hague, 35 countries pledged to turn international guidelines on nuclear security into national laws and open up their procedures for protecting nuclear installations to independent scrutiny. The summit also featured new reduction commitments, with Japan, Italy and Belgium agreeing to cut their stocks of highly enriched uranium and plutonium.

At the same time, there were setbacks. Russia was notably absent from the 35-nation agreement, along with China, India and Pakistan, all nations with nuclear weapons.