Changes

==Growing number of border walls around the world==

==Growing number of border walls around the world==

The number of border walls has been increasing around the world, and the number being built is accelerating.<ref name="Economist"/><ref name="FinancialTimes"/><ref name="WashingtonPost"/> By 2017, over 60 (and according to some sources, nearly 70) border walls existed around the world,<ref name="Economist">[https://www.economist.com/blogs/graphicdetail/2016/01/daily-chart-5 More neighbours make more fences]. ''The Economist''. January 7, 2016. Retrieved August 26, 2017.</ref><ref name="FinancialTimes">Greaves, Simon; Faunce, Liz (March 26, 2017). [https://www.ft.com/content/9d4d10cc-0e28-11e7-b030-768954394623 Rise of the border wall shows there is more that divides us]. ''Financial Times''. Retrieved August 26, 2017.</ref><ref>Tomlinson, Simon (August 21, 2015). [http://www.dailymail.co.uk/news/article-3205724/How-65-countries-erected-security-walls-borders.html World of walls: How 65 countries have erected fences on their borders – four times as many as when the Berlin Wall was toppled – as governments try to hold back the tide of migrants]. ''Daily Mail''. Retrieved August 26, 2017.</ref><ref name="WashingtonPost">Samuel Granados, Samuel; Murphy, Zoeann; Schaul, Kevin; Faiola, Anthony (October 12, 2016). [https://www.washingtonpost.com/graphics/world/border-barriers/global-illegal-immigration-prevention/ Raising Barriers: A New Age of Walls · Episode 1]. ''The Washington Post''. Retrieved August 26, 2017.</ref><ref>Gainor, Cathy (August 26, 2017). [http://www.washingtonexaminer.com/map-border-walls-rise-around-the-world/article/2632607 Map: Border walls rise around the world]. ''Washington Examiner''. Retrieved August 26, 2017.</ref> None of those barriers existed before 1945, and their number slowly grew until the [[September 11, 2001 attacks]], after which the rate of wall building greatly increased.<ref name="FinancialTimes"/><ref name="WashingtonPost"/>

The number of border walls has been increasing around the world, and the number being built is accelerating.<ref name="Economist"/><ref name="FinancialTimes"/><ref name="WashingtonPost"/> By 2017, over 60 (and according to some sources, nearly or over 70) border walls existed around the world,<ref name="Economist">[https://www.economist.com/blogs/graphicdetail/2016/01/daily-chart-5 More neighbours make more fences]. ''The Economist''. January 7, 2016. Retrieved August 26, 2017.</ref><ref name="FinancialTimes">Greaves, Simon; Faunce, Liz (March 26, 2017). [https://www.ft.com/content/9d4d10cc-0e28-11e7-b030-768954394623 Rise of the border wall shows there is more that divides us]. ''Financial Times''. Retrieved August 26, 2017.</ref><ref>Tomlinson, Simon (August 21, 2015). [http://www.dailymail.co.uk/news/article-3205724/How-65-countries-erected-security-walls-borders.html World of walls: How 65 countries have erected fences on their borders – four times as many as when the Berlin Wall was toppled – as governments try to hold back the tide of migrants]. ''Daily Mail''. Retrieved August 26, 2017.</ref><ref name="WashingtonPost">Samuel Granados, Samuel; Murphy, Zoeann; Schaul, Kevin; Faiola, Anthony (October 12, 2016). [https://www.washingtonpost.com/graphics/world/border-barriers/global-illegal-immigration-prevention/ Raising Barriers: A New Age of Walls · Episode 1]. ''The Washington Post''. Retrieved August 26, 2017.</ref><ref>Gainor, Cathy (August 26, 2017). [http://www.washingtonexaminer.com/map-border-walls-rise-around-the-world/article/2632607 Map: Border walls rise around the world]. ''Washington Examiner''. Retrieved August 26, 2017.</ref><ref>Simmons, Ann M. (January 31, 2017). [http://www.latimes.com/world/mexico-americas/la-fg-border-barriers-snap-20170131-story.html Border walls aren't unheard of, but today they increasingly divide friends, not enemies]. ''Los Angeles Times''. Retrieved August 26, 2017.</ref> None of the barriers currently in operation existed before 1945, and their number slowly grew until the [[September 11, 2001 attacks]], after which the rate of wall building greatly increased.<ref name="FinancialTimes"/><ref name="WashingtonPost"/><ref>Friedman, Uri (May 19, 2016). [https://www.theatlantic.com/international/archive/2016/05/donald-trump-wall-mexico/483156/ A World of Walls]. ''The Atlantic''. Retrieved August 26, 2017.</ref>

==Great Wall of China==

==Great Wall of China==