Michaelkov shared a story from Josip Broz Tito's biography: following a tip from Soviet intelligence, a spy working for the American intelligence services was exposed at the top of Yugoslavia's leadership. At the same time, there were no external connections with the United States, no clear evidence of treason. As a result, the spy admitted that his mission was an actual sabotage of the government administration. Moreover, without any sabotage - simply due to a "skilled personnel policy". Kim Philby did much the same.