Assassination 15 Presidents 14 History 13 Decision making 9 Politics and government 9 Foreign relations 6 Murder 6 more ... National security 6 Conspiracies 4 Forensic ballistics 4 International relations 4 Political leadership 4 Politique et gouvernement 4 Diplomatic relations 3 Investigation 3 Mord 3 Présidents 3 Prise de décision 3 Psychology 3 Relations extérieures 3 Cancer 2 Change (Psychology) 2 Contamination 2 Death and burial 2 Epidemics 2 Leadership 2 Meurtre 2 Mistresses 2 Paramours 2 Poliomyelitis vaccine 2 less ...