Clashes between government forces and Tutsi rebels could force 30,000 people from their homes in eastern Congo.
With no progress on Iran, and setbacks on North Korea, the deal may be Bush's only nonproliferation feat.
The move shows a willingness to act on common goals despite deteriorating relations.
He also singles out Iran's pursuit of a nuclear program as endangering international security.
The administration's attitude toward the UN has evolved from antipathy to engagement.
The Yongbyon reactor could be operational again within a year.
Some 15,000 in custody may be in limbo when UN rules that govern Iraq lapse in December.
Russia and China are looking for new influence as the council deals with knotty issues like Iran.