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People hold a banner picturing Gambia's opposition candidate Adama Barrow as they celebrate his victory during the Presidential Elections on December 2, 2016, in Serekunda, Banjul. The impoverished west African nation of Gambia is set for a rare handover of power after long-serving President Yahya Jammeh suffered a shock defeat at the polls. Rights bodies and media watchdogs accuse Jammeh of cultivating a 'pervasive climate of fear' during his 22 years in office and of crushing dissent against his regime. / AFP / MARCO LONGARI (Photo credit should read MARCO LONGARI/AFP/Getty Images)

People hold a banner picturing Gambia's opposition candidate Adama Barrow as they celebrate his victory during the Presidential Elections on December 2, 2016, in Serekunda, Banjul.

The impoverished west African nation of Gambia is set for a rare handover of power after long-serving President Yahya Jammeh suffered a shock defeat at the polls. Rights bodies and media watchdogs accuse Jammeh of cultivating a 'pervasive climate of fear' during his 22 years in office and of crushing dissent against his regime.
 / AFP / MARCO LONGARI        (Photo credit should read MARCO LONGARI/AFP/Getty Images)

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An image grab shows supporters of opposition candidate Adama Barrow cheering on the streets of Banjul, after the latter pulled off a stunning victory in the Gambia, comfortably winning a presidential election and putting an end to the 22-year rule of Yahya Jammeh, official results showed on December 2, 2016. Jammeh had conceded defeat, the chairman of the Independent Electoral Commission (IEC) said as Gambians began to take to the streets to celebrate the biggest upset in the west African nation since Jammeh seized power in a 1994 coup. / AFP / Joe Sinclair (Photo credit should read JOE SINCLAIR/AFP/Getty Images)

An image grab shows supporters of opposition candidate Adama Barrow cheering on the streets of Banjul, after the latter pulled off a stunning victory in the Gambia, comfortably winning a presidential election and putting an end to the 22-year rule of Yahya Jammeh, official results showed on December 2, 2016.
Jammeh had conceded defeat, the chairman of the Independent Electoral Commission (IEC) said as Gambians began to take to the streets to celebrate the biggest upset in the west African nation since Jammeh seized power in a 1994 coup. / AFP / Joe Sinclair        (Photo credit should read JOE SINCLAIR/AFP/Getty Images)

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An image grab shows supporters of opposition candidate Adama Barrow cheering on the streets of Banjul, after the latter pulled off a stunning victory in the Gambia, comfortably winning a presidential election and putting an end to the 22-year rule of Yahya Jammeh, official results showed on December 2, 2016. Jammeh had conceded defeat, the chairman of the Independent Electoral Commission (IEC) said as Gambians began to take to the streets to celebrate the biggest upset in the west African nation since Jammeh seized power in a 1994 coup. / AFP / Joe Sinclair (Photo credit should read JOE SINCLAIR/AFP/Getty Images)

An image grab shows supporters of opposition candidate Adama Barrow cheering on the streets of Banjul, after the latter pulled off a stunning victory in the Gambia, comfortably winning a presidential election and putting an end to the 22-year rule of Yahya Jammeh, official results showed on December 2, 2016.
Jammeh had conceded defeat, the chairman of the Independent Electoral Commission (IEC) said as Gambians began to take to the streets to celebrate the biggest upset in the west African nation since Jammeh seized power in a 1994 coup.
 / AFP / Joe Sinclair        (Photo credit should read JOE SINCLAIR/AFP/Getty Images)

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A man waves a Gambian flag as he stands by a Gambian soldiers while he celebrates the victory of Gambia's opposition candidate Adama Barrow during the Presidential Elections on December 2, 2016, in Serekunda, Banjul. The impoverished west African nation of Gambia is set for a rare handover of power after long-serving President Yahya Jammeh suffered a shock defeat at the polls. Rights bodies and media watchdogs accuse Jammeh of cultivating a 'pervasive climate of fear' during his 22 years in office and of crushing dissent against his regime. / AFP / MARCO LONGARI (Photo credit should read MARCO LONGARI/AFP/Getty Images)

A man waves a Gambian flag as he stands by a Gambian soldiers while he celebrates the victory of Gambia's opposition candidate Adama Barrow during the Presidential Elections on December 2, 2016, in Serekunda, Banjul.
The impoverished west African nation of Gambia is set for a rare handover of power after long-serving President Yahya Jammeh suffered a shock defeat at the polls. Rights bodies and media watchdogs accuse Jammeh of cultivating a 'pervasive climate of fear' during his 22 years in office and of crushing dissent against his regime.
 / AFP / MARCO LONGARI        (Photo credit should read MARCO LONGARI/AFP/Getty Images)

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A man waves a Gambian flag as he celebrates the victory of Gambia's opposition candidate Adama Barrow during the Presidential Elections on December 2, 2016, in Serekunda, Banjul. The impoverished west African nation of Gambia is set for a rare handover of power after long-serving President Yahya Jammeh suffered a shock defeat at the polls. Rights bodies and media watchdogs accuse Jammeh of cultivating a 'pervasive climate of fear' during his 22 years in office and of crushing dissent against his regime. / AFP / MARCO LONGARI (Photo credit should read MARCO LONGARI/AFP/Getty Images)

A man waves a Gambian flag as he celebrates the victory of Gambia's opposition candidate Adama Barrow during the Presidential Elections on December 2, 2016, in Serekunda, Banjul.

The impoverished west African nation of Gambia is set for a rare handover of power after long-serving President Yahya Jammeh suffered a shock defeat at the polls. Rights bodies and media watchdogs accuse Jammeh of cultivating a 'pervasive climate of fear' during his 22 years in office and of crushing dissent against his regime.
 / AFP / MARCO LONGARI        (Photo credit should read MARCO LONGARI/AFP/Getty Images)