Residents clear away debris from their home after a powerful tornado swept past in Ciudad Acuna, northern Mexico, Monday, May 25, 2015.

At least 13 killed in Mexican border city; 12 missing in Texas flooding.

Ruined houses are seen after retreating Boko Haram attacked them in the city of Yola in Adamawa province, Nigeria on May 16, 2016.

Army relocates hundreds rescued from the militant Islamist group.

French president Francois Hollande(l) and Haitian President Michel Martelly, arrive to tour the MUPANAH -musée du panthéon national Haitien (Haitian Pantheon national museum), on May 12, 2015 in Port-au-Prince, Haiti.

The French leader, however, steered clear of the reparations some in the former colony are demanding.

A Chinese coast guard ship (back) sails next to a Vietnamese coast guard vessel (front) near China's oil drilling rig in disputed waters in the South China Sea, May 14, 2014.

Says deal will reduce tensions that have put Beijing at odds with its neighbors and the U.S.

Cadets of Cossack military academy practice in Sevastopol on May 15, 2015.

Ministry described drill as tool to check "combat readiness."

Iraqi security forces stand guard as residents from the city of Ramadi, who fled their homes as Islamic State (IS) group militants tightened their siege on the last government positions in the capital of Anbar province, wait to cross Bzeibez bridge, on the southwestern frontier of Baghdad, on May 20, 2015.

Forces withdrew from al-Tanf crossing as Islamic State advanced.

Law enforcement officers talk to a man near the parking lot of a Twin Peaks Restaurant

Clash between rival gangs also results in 18 injuries.