There are many open questions regarding virtually all aspects of contemporary security, especially the activities states engage in and the instruments they use to achieve domestic and international security. While many still consider "providing for the nation's defense" to be the main purpose for the armed forces, for example, few militaries today are in fact trained and equipped to engage in combat with militaries of other states. Instead, militaries are involved in a wide variety of other activities. Today there are some 81,000 military and police personnel from up to 114 countries engaged in peace support operations (PSO) in sixteen strife-ridden countries. According to the United Nations Under-Secretary General for Peacekeeping Operations, Mr. Jean-Marie Guéhenno, by the end of 2007 the UN will have over 140,000 peacekeepers deployed. In early 2007, international peacekeeping forces in Haiti were engaged in fighting street gangs, which is more typically a police function (New York Times, 2007: 1).