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A woman votes at a polling station in Monrovia in 2011 after the country's disputed presidential run-off, which was followed by boycotts and violence.
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INDONESIA: BALLOT, THEN INK
According to the Associated Foreign Press, this concerned citizen dressed up as a plant in 2015 to increase awareness of issues facing the environment, showing his inked finger after voting in the country's first nationwide regional elections in Surabaya.
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Gambians cast their votes with clear glass marbles, which they put into a one of three drums representing each presidential candidate. "It's a unique system introduced in 1965 because of Gambia's high illiteracy," Gambia's chief electoral officer Kawsu Ceesay told the BBC. "The drums are painted in the colour of the candidate's party and have their photograph and party symbol."
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A woman hands in her voting slip in the Muslim-dominated town of Mukalmua in 2009. Voting was conducted under high security after Maoist rebels threatened attacks, and at least 19 people were killed during the first phase of elections.
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After voting, Peruvians get their fingers ink-marked to prove they voted and prevent fraud, a custom in many countries around the world.
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AUSTRALIA: BALLOT IN BOOTHS
Voters head to the polls in Bondi Beach on Election Day 2013 wearing their beach gear, of course. (As far as we know, this is not a countrywide requirement.)
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GHANA: BY MACHINE
During the 2012 presidential election, polls were extended after technical glitches in the biometric voting systems and excessive delays. Here, an electoral officer checks the identification of a prison guard before she casts her ballot.
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SOUTH KOREA: BALLOT
A Seoul woman was joined by her pup — who keeps vigilant watch — in the polling station this year.