 Secondly, the document states that collective defence remains the core purpose of NATO, but at the same time emphasizes potential NATO contributions to conflict prevention and crisis management, and the potential planning and management of missions like that in Afghanistan.The "Riga Declaration" even described the capability for such missions as NATO's "top priority".Additionally, Jaap de Hoop Scheffer wanted and expected a new Strategic Concept to be debated and agreed upon by 2008, reinforcing already existing views that the CPG will most likely last much less than the 10 to 15 years as the guiding policy document.