Dmitry Akhanov, president of the U.S. subsidiary of Russia’s state-owned venture fund RUSNANO, poses for a portrait in his office on Wednesday, April 9, 2014, in Menlo Park, Calif. Entrepreneurs and investors say Silicon Valley’s fast growing ties with Russia’s tech sector are being slowed down by current political tensions between the White House and the Kremlin. (AP Photo/Marcio Jose Sanchez)