sentences:  Briefing on the high-level event to the Peacebuilding Commission, the President of the General Assembly stressed that "Again and again, we have reaffirmed the role for the PBC as one of the UN’s most valuable tools for Sustaining Peace.This was clear, during the review of the Peacebuilding Architecture, in 2015.It was clear, through the adoption of the twin resolutions on Sustaining Peace, a year later.