Corporate funding is provided by mutual of america, designing customized individual and Group Retirement products. Thats why we are your retirement company. Edded Additional Support is provided by and by the corporation for public broadcasting. And by and by contributions to your pbs station from viewers like you. Thank you. From the tish w. E. Studios in Lincoln Center in new york, this is pbs news hour weekend. Good evening, thanks for joining us. Secretary of state john kerry and russian feign minister Sergie Lavrov conferred by telephone today in the latest effort to defuse the crisis in ukraine. Russian separatists who occupy government buildings aross Eastern Ukraine three weeks ago say they are willing to release eight International Military observers they detained, but only if other separatists in custody are also freed. Recent satellite images show tens of thousands of Russian Troops massed along the border with ukraine. The pentagon said yesterday that russian fighter jets ha