Nations Adopt Climate Agreement at COP21 Conference

French Foreign Minister and president of the COP21 Laurent Fabius uses to hammer to to mark the adoption of the agreement while United Nations climate chief Christiana Figueres looks on.

Activists dressed like animals stage a die in during a demonstration in Paris.

Costumed activists demonstrate near the Eiffel Tower.

A demonstrator is searched before a protest near the Eiffel Tower.

Secretary of State John Kerry, left, talks with China's Special Representative on Climate Change Xie Zhenhua prior to the opening of the final COP21 conference.

Activists wait with their bear costume before a demonstration near the Eiffel Tower.

Activists gather near the Eiffel Tower in Paris.

United Nations Secretary General Ban Ki-moon, right, watches French President Francois Hollande hug United Nations climate chief Christiana Figueres.