Renewed fighting in eastern Congo in recent weeks has caused thousands of Congolese to flee into neighbouring Uganda and Rwanda.
Andy Jacobsohn/Getty Images
After tense negotiations, Chen Guangcheng - a blind activist who daringly escaped from house arrest in China last month - was allowed to leave China for the US on a student visa, where he will attend New York University Law School.
ODD ANDERSEN/AFP/Getty Images
After dramatically tying the game in the 88th minute, Chelsea FC defeated Bayern Muenchen on penalty kicks to win the UEFA Champions League on May 19.
Protests erupted in Chicago as the 25th annual North Atlantic Treaty
Organization (NATO) summit brought delegations from about 60 countries
to discuss the war in Afghanistan and European missile defence.
ZEF NIKOLLA / HO/EPA
In the most highly anticipated initial public offering of the year, Facebook - the world's second-most-visited website - began trading its stock on the NASDAQ exchange.
Former Bosnian Serb army commander Ratko Mladic went on trial at the International Criminal Tribunal for the former Yugoslavia (ICTY) at The Hague. But just a day after the trial started, the judge postponed the trial, citing "errors" made by prosecutors.
An earthquake of magnitude 6.0 hit northern Italy near Bologna, killing seven and damaging historic buildings, including Delle Rocche castle.
John Moore/Getty Images
Egyptian presidential candidate Abdel Moneim Aboul Fotouh, regarded as a moderate Islamist, addresses a crowd as the May 23-24 election approaches.
Abdulbasit al-Megrahi - the former Libyan intelligence officer convicted of the 1988 Lockerbie bombing - died on May 20 after a lengthy fight with cancer.
JUAN BARRETO/AFP/Getty Images
The presidential candidate for the Dominican Revolution party, Hipolito Mejia, is greeted by supporters during a rally in Santo Domingo. Dominicans are electing a new president on May 20.