Catalan Pro-independence demonstrators protest in front of the Barcelona City Hall against the suspension of the self-determination referendum by the Spanish Constitutional Court on September 30, 2014 in Barcelona, Spain.

Protesters take to the streets of Barcelona after the Catalan gov't says it remains "determined" to hold vote.

A screengrab taken on July 13, 2014 from a video released by the Nigerian Islamist extremist group Boko Haram and obtained by AFP shows the leader of the Nigerian Islamist extremist group Boko Haram, Abubakar Shekau.

At least three were killed in attack by militants on politician's home.

Demonstrators protesting against police killings of blacks march past a campaign poster featuring Brazilian President Dilma Rousseff (R) on August 22, 2014 in Rio de Janeiro, Brazil.

Weeks before an October run-off, Brazil's President Dilma Rousseff is regaining momentum.

Students attend the rally at Chinese University on September 22, 2014 in Hong Kong. Thousands of students from more than 20 tertiary institutions start the week-long boycott of classes to protest against Beijing's conservative framwork for political reform in Hong Kong by attending a rally at the University.

Students boycotting classes to protest China's decision how Hong Kong's leader should be elected.

Supporters of Golden Dawn party are seen around Athens municipal amphitheater during a swearing in ceremony on August 29, 2014 in Athens, Greece.

Thousands turned out for the one-year anniversary of the killing of a rapper by a far-right party supporter. 

Iranian Foreign Minister Mohammad Javad Zarif speaks at a press conference in Tehran on August 31, 2014.

Iran and six world powers will hold their first negotiating round since failing to meet July target date.

(L-R) Primatologist Jane Goodall, Former U.S. Vice President and environmental activist Al Gore, New York City Mayor Bill deBlasio and United Nations Secretary General Ban Ki-Moon participates in the People's Climate March on September 21, 2014 in New York City.

Goal is to galvanise member states to sign up to a comprehensive new global climate agreement.