<P> The Berlin Wall officially remained guarded after 9 November 1989, although the inter-German border had become effectively meaningless . The official dismantling of the Wall by the East German military did not begin until June 1990 . In July 1990, the day East Germany adopted the West German currency, all border - controls ceased and West German Chancellor Helmut Kohl convinced Gorbachev to drop Soviet objections to a reunited Germany within NATO in return for substantial German economic aid to the Soviet Union . </P> <P> There is an Iron Curtain monument in the southern part of the Czech Republic at approximately 48 ° 52 ′ 32" N 15 ° 52 ′ 29" E ﻿ / ﻿ 48.8755 ° N 15.87477 ° E ﻿ / 48.8755; 15.87477 ﻿ (Iron Curtain monument). A few hundred meters of the original fence, and one of the guard towers, has remained installed . There are interpretive signs in Czech and English that explain the history and significance of the Iron Curtain . This is the only surviving part of the fence in the Czech Republic, though several guard towers and bunkers can still be seen . Some of these are part of the Communist Era defences, some are from the never - used Czechoslovak border fortifications in defence against Adolf Hitler, and some towers were, or have become, hunting platforms . </P> <P> Another monument is located in Fertőrákos, Hungary, at the site of the Pan-European Picnic . On the eastern hill of the stone quarry stands a metal sculpture by Gabriela von Habsburg . It is a column made of metal and barbed wire with the date of the Pan-European Picnic and the names of participants . On the ribbon under the board is the Latin text: "In necessariis unitas--in dubiis libertas--in omnibus caritas ." (Unity in unavoidable matters--freedom in doubtful matters--love in all things .) The memorial symbolises the iron curtain and recalls forever the memories of the border breakthrough in 1989 . </P> <P> Another monument is located in the village of Devín, now part of Bratislava, Slovakia, at the confluence of the Danube and Morava rivers . Another monument is located in Fertőrákos, Hungary, at the site of the Pan-European Picnic . On the eastern hill of the stone quarry stands a metal sculpture by Gabriela von Habsburg . It is a column made of metal and barbed wire with the date of the Pan-European Picnic and the names of participants . On the ribbon under the board is the Latin text: "In necessariis unitas--in dubiis libertas--in omnibus caritas ." (Unity in unavoidable matters--freedom in doubtful matters--love in all things .) The memorial symbolises the iron curtain and recalls forever the memories of the border breakthrough in 1989 . </P>

Who was involved in the iron curtain speech