Details of Russian obstruction paint bleak picture for American held in Moscow

(CNN)As American security executive Paul Whelan enters his third month of detention in a Moscow prison with no end in sight, sources with knowledge of the situation paint a grim picture of Russia’s interference in US efforts to assist him. Whelan is not allowed any visits from friends or family, the sources say, and he hasn’t been given any of the more than 100 letters his family members have sent him. He has been able to send letters home, but the assumption is that they are being read by the Russian authorities. Also, Whelan is not allowed to discuss why he’s there or details of his case. The sources say US officials have complied with the rules so they don’t …