A combination picture shows sections of the border fence separating the United States and Mexico, outside Brownsville, Texas, August 5, 2014. On the 25th anniversary of the fall of the Berlin Wall, there are still barriers separating communities around the world, from the barbed wire fence dividing the two Koreas, the fence around the Spanish enclave of Melilla, to the sectarian Peace Wall in Belfast, the Israel-Gaza barrier and the border separating Mexico from the United States. Pictures taken August 5, 2014. REUTERS/Shannon Stapleton (UNITED STATES - Tags: ANNIVERSARY CIVIL UNREST POLITICS SOCIETY IMMIGRATION)

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Clothes hang for drying in the backyard of a home facing the border fence at the United States-Mexico border outside of Brownsville, Texas, August 5, 2014. On the 25th anniversary of the fall of the Berlin Wall, there are still barriers separating communities around the world, from the barbed wire fence dividing the two Koreas, the fence around the Spanish enclave of Melilla, to the sectarian Peace Wall in Belfast, the Israel-Gaza barrier and the border separating Mexico from the United States. Picture taken August 5, 2014. REUTERS/Shannon Stapleton (UNITED STATES - Tags: ANNIVERSARY POLITICS SOCIETY IMMIGRATION TPX IMAGES OF THE DAY)

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A break in the border fence at the United States-Mexico border is seen outside of Brownsville, Texas, August 5, 2014. On the 25th anniversary of the fall of the Berlin Wall, there are still barriers separating communities around the world, from the barbed wire fence dividing the two Koreas, the fence around the Spanish enclave of Melilla, to the sectarian Peace Wall in Belfast, the Israel-Gaza barrier and the border separating Mexico from the United States. Picture taken August 5, 2014. REUTERS/Shannon Stapleton (UNITED STATES - Tags: ANNIVERSARY POLITICS SOCIETY IMMIGRATION)

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The border crossing into Mexico is seen through the border fence at the United States-Mexico border along the Rio Grande river in Brownsville, Texas August 5, 2014. On the 25th anniversary of the fall of the Berlin Wall, there are still barriers separating communities around the world, from the barbed wire fence dividing the two Koreas, the fence around the Spanish enclave of Melilla, to the sectarian Peace Wall in Belfast, the Israel-Gaza barrier and the border separating Mexico from the United States. Picture taken August 5, 2014. REUTERS/Shannon Stapleton (UNITED STATES - Tags: ANNIVERSARY POLITICS SOCIETY IMMIGRATION TPX IMAGES OF THE DAY)

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A combination pictures shows views of the demilitarized zone that separates North and South Korea in Paju, October 31, 2014. On the 25th anniversary of the fall of the Berlin Wall, there are still barriers separating communities around the world, from the barbed wire fence dividing the two Koreas, the fence around the Spanish enclave of Melilla, to the sectarian Peace Wall in Belfast, the Israel-Gaza barrier and the border separating Mexico from the United States. Pictures taken October 31, 2014. REUTERS/Kim Hong-Ji (SOUTH KOREA - Tags: ANNIVERSARY CIVIL UNREST POLITICS SOCIETY)

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A barbed wire fence decorated with ribbons bearing messages wishing the unification of the two Koreas is pictured near the demilitarized zone which separates North and South Korea in Paju October 31, 2014. On the 25th anniversary of the fall of the Berlin Wall, there are still barriers separating communities around the world, from the barbed wire fence dividing the two Koreas, the fence around the Spanish enclave of Melilla, to the sectarian Peace Wall in Belfast, the Israel-Gaza barrier and the border separating Mexico from the United States. Picture taken October 31, 2014. REUTERS/Kim Hong-Ji (SOUTH KOREA - Tags: ANNIVERSARY CIVIL UNREST POLITICS SOCIETY)

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A barbed wire fence decorated with South Korean national flags is pictured near the demilitarized zone which separates North and South Korea in Paju October 31, 2014. On the 25th anniversary of the fall of the Berlin Wall, there are still barriers separating communities around the world, from the barbed wire fence dividing the two Koreas, the fence around the Spanish enclave of Melilla, to the sectarian Peace Wall in Belfast, the Israel-Gaza barrier and the border separating Mexico from the United States. Picture taken October 31, 2014. REUTERS/Kim Hong-Ji (SOUTH KOREA - Tags: ANNIVERSARY CIVIL UNREST POLITICS SOCIETY)

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A rice field is seen in front of a barbed wire fence near the demilitarized zone which separates North and South Korea in Paju October 31, 2014. On the 25th anniversary of the fall of the Berlin Wall, there are still barriers separating communities around the world, from the barbed wire fence dividing the two Koreas, the fence around the Spanish enclave of Melilla, to the sectarian Peace Wall in Belfast, the Israel-Gaza barrier and the border separating Mexico from the United States. Picture taken October 31, 2014. REUTERS/Kim Hong-Ji (SOUTH KOREA - Tags: AGRICULTURE ANNIVERSARY CIVIL UNREST POLITICS SOCIETY)

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A combination picture shows sections of the border fence which separates Morocco from Spain's north African enclave of Melilla, December 3, 2013. On the 25th anniversary of the fall of the Berlin Wall, there are still barriers separating communities around the world, from the barbed wire fence dividing the two Koreas, the fence around the Spanish enclave of Melilla, to the sectarian Peace Wall in Belfast, the Israel-Gaza barrier and the border separating Mexico from the United States. Pictures taken December 3, 2013. REUTERS/Juan Medina (SPAIN - Tags: ANNIVERSARY CIVIL UNREST POLITICS SOCIETY IMMIGRATION)

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A view of the border fence which separates Morocco and Spain's north African enclave of Melilla, December 3, 2013. On the 25th anniversary of the fall of the Berlin Wall, there are still barriers separating communities around the world, from the barbed wire fence dividing the two Koreas, the fence around the Spanish enclave of Melilla, to the sectarian Peace Wall in Belfast, the Israel-Gaza barrier and the border separating Mexico from the United States. Picture taken December 3, 2013. REUTERS/Juan Medina (SPAIN - Tags: ANNIVERSARY CIVIL UNREST POLITICS SOCIETY IMMIGRATION TPX IMAGES OF THE DAY)

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A view of the border fence which separates Morocco and Spain's north African enclave of Melilla, December 3, 2013. On the 25th anniversary of the fall of the Berlin Wall, there are still barriers separating communities around the world, from the barbed wire fence dividing the two Koreas, the fence around the Spanish enclave of Melilla, to the sectarian Peace Wall in Belfast, the Israel-Gaza barrier and the border separating Mexico from the United States. Picture taken December 3, 2013. REUTERS/Juan Medina (SPAIN - Tags: ANNIVERSARY POLITICS SOCIETY IMMIGRATION)

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The moon is seen above the border fence which separates Morocco and Spain's north African enclave of Melilla, December 3, 2013. On the 25th anniversary of the fall of the Berlin Wall, there are still barriers separating communities around the world, from the barbed wire fence dividing the two Koreas, the fence around the Spanish enclave of Melilla, to the sectarian Peace Wall in Belfast, the Israel-Gaza barrier and the border separating Mexico from the United States. Picture taken December 3, 2013. REUTERS/Juan Medina (SPAIN - Tags: ANNIVERSARY POLITICS SOCIETY IMMIGRATION TPX IMAGES OF THE DAY)

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A combination picture shows sections of the controversial Israeli barrier running through the West Bank. Top left and top right pictures taken October 29, 2014. Bottom picture taken October 31, 2014. On the 25th anniversary of the fall of the Berlin Wall, there are still barriers separating communities around the world, from the barbed wire fence dividing the two Koreas, the fence around the Spanish enclave of Melilla, to the sectarian Peace Wall in Belfast, the Israel-Gaza barrier and the border separating Mexico from the United States. REUTERS/Finbarr O'Reilly (WEST BANK - Tags: ANNIVERSARY CIVIL UNREST POLITICS SOCIETY)

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Paint is splashed against a section of the separation barrier in the West Bank city of Abu Dis, October 29, 2014. On the 25th anniversary of the fall of the Berlin Wall, there are still barriers separating communities around the world, from the barbed wire fence dividing the two Koreas, the fence around the Spanish enclave of Melilla, to the sectarian Peace Wall in Belfast, the Israel-Gaza barrier and the border separating Mexico from the United States. Picture taken October 29 , 2014. REUTERS/Finbarr O'Reilly (WEST BANK - Tags: ANNIVERSARY CIVIL UNREST POLITICS SOCIETY)

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The golden Dome of the Rock (C) in Jerusalem's old city is seen in the distance beyond a section of the controversial Israeli barrier in the West Bank city of Abu Dis, October 29 , 2014. The Dome of the Rock is situated within the Al-Aqsa compound, known to Muslims as Noble Sanctuary and to Jews as Temple Mount. On the 25th anniversary of the fall of the Berlin Wall, there are still barriers separating communities around the world, from the barbed wire fence dividing the two Koreas, the fence around the Spanish enclave of Melilla, to the sectarian Peace Wall in Belfast, the Israel-Gaza barrier and the border separating Mexico from the United States. Picture taken October 29, 2014. REUTERS/Finbarr O'Reilly (WEST BANK - Tags: ANNIVERSARY CIVIL UNREST POLITICS SOCIETY)

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A section of the controversial Israeli barrier cuts beneath the West Bank refugee camp of Shuafat, October 31, 2014. On the 25th anniversary of the fall of the Berlin Wall, there are still barriers separating communities around the world, from the barbed wire fence dividing the two Koreas, the fence around the Spanish enclave of Melilla, to the sectarian Peace Wall in Belfast, the Israel-Gaza barrier and the border separating Mexico from the United States. Picture taken October 31 , 2014. REUTERS/Finbarr O'Reilly (WEST BANK - Tags: ANNIVERSARY CIVIL UNREST POLITICS SOCIETY)

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A combination of file pictures shows sections of the Line of Control that separates India and Pakistan. On the 25th anniversary of the fall of the Berlin Wall, there are still barriers separating communities around the world, from the barbed wire fence dividing the two Koreas, the fence around the Spanish enclave of Melilla, to the sectarian Peace Wall in Belfast, the Israel-Gaza barrier and the border separating Mexico from the United States. Top left picture taken in Suchetgarh, January 14, 2013, top right picture taken in Sabjiyan, August 8, 2013: REUTERS/Mukesh Gupta/Files; Bottom picture taken on the Siachen Glacier, October 4, 2003: REUTERS/Pawel Kopcyznski/Files (INDIA - Tags: ANNIVERSARY SOCIETY POLITICS CIVIL UNREST)

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A combination of file pictures shows sections of the United Nations buffer zone that runs through Cyprus separating the ethnic Greek and Turkish communities. On the 25th anniversary of the fall of the Berlin Wall, there are still barriers separating communities around the world, from the barbed wire fence dividing the two Koreas, the fence around the Spanish enclave of Melilla, to the sectarian Peace Wall in Belfast, the Israel-Gaza barrier and the border separating Mexico from the United States. Top left picture taken in Nicosia, March 15, 2014. Top right picture taken in Nicosia, March 10, 2014. Bottom picture taken in Fanagusta, March 14, 2014. REUTERS/Neil Hall/Files (CYPRUS - Tags: ANNIVERSARY POLITICS SOCIETY)

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A watchtower stands along the United Nations buffer zone in the district of Famagusta, northern Cyprus in this March 14, 2014 file picture. Cyprus is split by the buffer zone east to west, with ethnic Greeks living in the south and Turks in the north. On the 25th anniversary of the fall of the Berlin Wall, there are still barriers separating communities around the world, from the barbed wire fence dividing the two Koreas, the fence around the Spanish enclave of Melilla, to the sectarian Peace Wall in Belfast, the Israel-Gaza barrier and the border separating Mexico from the United States. Picture taken March 14, 2014. REUTERS/Neil Hall/Files (CYPRUS - Tags: ANNIVERSARY POLITICS SOCIETY)

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A combination picture shows three different views of the Peace Wall that divides Catholic and Protestant communities in Belfast, October 3, 2014. On the 25th anniversary of the fall of the Berlin Wall, there are still barriers separating communities around the world, from the barbed wire fence dividing the two Koreas, the fence around the Spanish enclave of Melilla, to the sectarian Peace Wall in Belfast, the Israel-Gaza barrier and the border separating Mexico from the United States. Pictures taken October 3, 2014. REUTERS/Cathal McNaughton (NORTHERN IRELAND - Tags: ANNIVERSARY POLITICS SOCIETY)

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A tourist walks along a section of the Peace Wall on Cupar Way in West Belfast October 3, 2014. On the 25th anniversary of the fall of the Berlin Wall, there are still barriers separating communities around the world, from the barbed wire fence dividing the two Koreas, the fence around the Spanish enclave of Melilla, to the sectarian Peace Wall in Belfast, the Israel-Gaza barrier and the border separating Mexico from the United States. Picture taken October 3, 2014. REUTERS/Cathal McNaughton (NORTHERN IRELAND - Tags: ANNIVERSARY POLITICS SOCIETY)

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A section of the Peace Wall cuts its way through Alexandra Park in North Belfast, October 3, 2014. On the 25th anniversary of the fall of the Berlin Wall, there are still barriers separating communities around the world, from the barbed wire fence dividing the two Koreas, the fence around the Spanish enclave of Melilla, to the sectarian Peace Wall in Belfast, the Israel-Gaza barrier and the border separating Mexico from the United States. Picture taken October 3, 2014. REUTERS/Cathal McNaughton (NORTHERN IRELAND - Tags: ANNIVERSARY POLITICS SOCIETY)

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A section of the Peace Wall that divides Catholic and Protestant communities cuts its way through West Belfast October 3, 2014. On the 25th anniversary of the fall of the Berlin Wall, there are still barriers separating communities around the world, from the barbed wire fence dividing the two Koreas, the fence around the Spanish enclave of Melilla, to the sectarian Peace Wall in Belfast, the Israel-Gaza barrier and the border separating Mexico from the United States. Picture taken October 3, 2014. REUTERS/Cathal McNaughton (NORTHERN IRELAND - Tags: ANNIVERSARY POLITICS SOCIETY)

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