Changes

==Construction==

==Construction==

The Wall was erected overnight on 13-14 August 1961. This was a Saturday night and most Berliners slept while the East German government began to close the border and install barbed wire fences through Berlin. The first concrete sections were installed on 15 August 1961, and over the following few months the concrete block sections were extended. In June 1962 the wall was further consolidated, and in 1965 the "third generation" of Wall replaced this earlier construction. Consisting of concrete slabs between steel girder and concrete posts with a concrete sewage pipe along the top, this was itself replaced in many areas after 1975 with newer concrete segements which were more resistant to breakthroughs.<ref>''Berlin Wall History: Facts'' [http://dailysoft.com/berlinwall/history/facts.htm Berlin Wall Online]. Accessed 30 January 2008</ref>

The Wall was erected overnight on 13-14 August 1961. This was a Saturday night and most Berliners slept while the East German government began to close the border and install barbed wire fences through Berlin. The first concrete sections were installed on 15 August 1961, and over the following few months the concrete block sections were extended. In June 1962 the wall was further consolidated, and in 1965 the "third generation" of Wall replaced this earlier construction. Consisting of concrete slabs between steel girder and concrete posts with a concrete sewage pipe along the top, this was itself replaced in many areas after 1975 with newer concrete segments which were more resistant to breakthroughs.<ref>''Berlin Wall History: Facts'' [http://dailysoft.com/berlinwall/history/facts.htm Berlin Wall Online]. Accessed 30 January 2008</ref>

[[Image:Berlin Wall layout.jpg|right|thumb|350px|Diagrammatic layout of the elements of the Berlin Wall]]

[[Image:Berlin Wall layout.jpg|right|thumb|400px|Diagrammatic layout of the elements of the Berlin Wall]]

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