U.S. Escalates Pressure on Russia Over Siberia Lab Death -- Update
By Michael R. Gordon, Robbie Gramer, Vera Bergengruen and Thomas Grove The U.S. has warned Moscow that its failure to disclose details about the death of a lab worker from a plague research center in Siberia runs counter to its international health obligations, U.S. officials said. Russia has provided the U.S. with lit