It was decided that Tresckow's group would assassinate Hitler and thereby provide the 'spark' for the coup, which Olbricht would direct from Berlin. In late 1942, Olbricht indicated that he still needed about eight weeks to complete preparations for the coup. Shortly thereafter, Tresckow traveled to Berlin to discuss the few remaining questions and emphasize that time was running short. In the winter of 1942, Olbricht declared: "We are ready. The spark can now be set off." Tresckow assured the conspirators that he would take action at the first available opportunity.