moscow russia former ambassador washington sergei kislyak say saturday conversations former white house national security adviser michael flynn transparent focus matter u.s.-russia cooperation kislyak end tenure washington july remain key figure ongoing u.s. investigations moscow allege meddle 2016 presidential election flynn force resign february become know fail disclose content conversations kislyak mislead u.s. vice-president mike pence meet speak simple things ... communication completely correct calm absolutely transparent case secrets side kislyak say panel discussion russian television number issue important cooperation russia unite state terrorism one things discuss russia 's kislyak talk trump 's ex-security aide 'absolutely transparent