sentences:  The PBC was inaugurated on June 2006, with the inclusion of Burundi and Sierra Leona as first cases of the Commission, as previously requested by the Security Council, in order to develop a country-specific model aiming to contribute to the implementation of the post-conflict tasks in each of both countries.The new environment and challenges brought by the post–September 11 system of international relations spurred the Secretary-General Kofi Annan to seek new proposals and solutions in order to reform a certain sensitive area of the UN system.This approximately was the mandate of the High Level Threat Panel.