German officers whose discussion was intercepted by Russia were vulnerable to wiretapping because they did not use an encrypted line for their conference, according to a report on Sunday. German lawmakers are demanding an investigation into how a Russian media outlet managed to publish a recording of German air force officers discussing support for Ukraine. The conversation between German defence officials was published on Friday by the head of the Russian state broadcaster RT, Margarita Simonyan. In it, senior air force officers discuss the theoretical possibilities of a deployment of German …