2 Sides ‘Under Pressure’ to Reach Arms Deal

U.S. and Russian negotiators are working “under pressure” to solve their differences and make a nuclear arms deal ready by a presidential summit in May, but they remain at odds over Russian cooperation with Iran, a U.S. diplomat said.

U.S. and Russian negotiators face “a number of difficult issues, questions of how exactly to account for the offensive strategic warheads, measures of transparency, verification,” U.S. Undersecretary of State John R. Bolton said after two days of talks in Moscow.

The U.S. has strongly urged Russia to stop leaks of ballistic missile technology to Iran and abandon its deal to build a nuclear reactor there. Russia has dismissed the concerns.