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Republican presidential nominee Donald Trump (L) and Democratic presidential nominee Hillary Clinton greet each other before the first US Presidential Debate at Hofstra University in Hempstead, New York
Gabonese police forces patrol as they clear barricades in the streets adjacent to the National Assembly, in Libreville on Thursday
Senator Bernie Sanders, an independent from Vermont and 2016 Democratic presidential candidate, speaks during a campaign rally at the Covelli Centre in Youngstown, Ohio
U.S. Republican presidential candidate Ted Cruz kisses his wife Heidi Cruz after winning at his Iowa caucus night rally in Des Moines, Iowa
A supporter waves signs supporting Hillary Clinton, former Secretary of State and 2016 Democratic presidential candidate, outside a campaign event at Abraham Lincoln High School in Des Moines, Iowa, U.S
A construction worker stands in front of a piece of street art portraying prospective U.S. Presidential candidate Donald Trump, in east London
A Syrian living in Jordan takes part in a protest against the Syrian presidential elections, near the Syrian embassy in Amman on Wednesday
Soldiers of the Presidential Regiment march during the Change of Guard ceremony at the Tomb of the Unknown Soldier in Moscow
A supporter of Afghan presidential candidate Abdullah Abdullah attends the final day of election campaigning near Kabul. Elections are to be held on Saturday
Afghan children play in the old part of the northwestern city of Herat. Presidential candidates have been holding rallies across the country for the upcoming presidential elections on April 5, to choose a successor to President Hamid Karzai.
School children pass a graffiti reading “ballot not bullet” on the outskirts of Kandahar, southern Afghanistan. Warlords with a violent past have played a role in influencing Afghan politics since a US-led coalition helped oust the Taliban in 2001. But they are emerging to play an overt political role in next month’s presidential elections as President Hamid Karzai leaves office.