West Berliners at right watch East German construction workers erect a wall across Wildenbruchstrasse and Heidelbergerstrasse in West Berlin in August 1961. (AP Photo)

In this Oct. 7, 1961 file photo, a West Berlin guard stands in front of the concrete wall dividing East and West Berlin at Bernauer Strasse. (AP Photo, File)

Aerial view of the border dividing West and East Berlin and the Brandenburg Gate in Berlin, August 13, 1966, five years after the building of the Berlin Wall. (AP Photo)

Edward Kennedy, in Berlin, inspects the Wall at Bernauer Street on Feb. 23, 1962. (AP Photo/Reichert)

Dying Peter Fechter is carried away by East German border guards who shot him down when he tried to flee to the west in this Aug. 17, 1962 file photo. (AP Photo/Files)

President John F. Kennedy delivers his famous speech "I am a Berliner" ("ich bin ein Berliner") in front of the city hall in West Berlin concerning the Berlin Wall, June 26, 1963. (AP-Photo)

A spectator jumps up as President Reagan gives a thumbs up sign in front of the Brandenburg Gate - where he had said "Mr. Gorbachev, tear down this wall!" - in this June 12, 1987 file photo. (AP Photo/J. Scott Applewhite)

Berliners from East and West crowd in front of the Brandenburger Tor (Branderburg Gate), early Friday morning, Nov. 10, 1989, standing atop and below the Berlin Wall. (AP Photo/Jockel Finck)

East and West Berliners mingle as they celebrate in front of a control station on East Berlin territory, Nov. 10, 1989, during the opening of the borders to the West. (AP Photo/Jockel Finck)

In this Nov. 11, 1989 file photo, East German border guards are seen through a gap in the Berlin wall after demonstrators pulled down a segment of the wall at Brandenburg gate, Berlin. (AP Photo/Lionel Cironneau, File)

An unidentified West Berliner swings a sledgehammer, trying to destroy the Berlin Wall near Potsdamer Platz, on November 12, 1989, where a new passage was opened nearby. (AP Photo/John Gaps III)

Aerial view of a traffic jam on November 11, 1989 as thousands of East German citizens move into West Berlin after the opening of the wall by the East German government. (AP Photo)

A man hammers away at the Berlin Wall on Nov. 12, 1989 as the border barrier between East and West Germany was torn down after 28 years, symbolically ending the Cold War. (AP Photo/John Gaps III)

An East Berlin border guard is hugged by an unidentified Berliner at Potsdammer Platz, Nov. 12, 1989, when East Germany opened the wall to the west at this historical landmark. (AP Photo/Rainer Klostermeier)

Berliners celebrate on top of the wall as East Germans, backs to camera, flood through the dismantled Berlin Wall at Potsdamer Platz in this Nov. 12, 1989, file photo. (AP Photo/FILE/Lionel Cironneau)

Edmond Howar, left, and David Schwartz, take advantage of the recent happenings in Berlin, selling what they claim are pieces of the Berlin Wall on Fifth Avenue in New York, Nov. 22, 1989. (AP PhotoTim Clary)

Former U.S. President Ronald Reagan, center, uses a hammer and chisel on the defunct Berlin Wall to take symbolic swings at the old Cold War barrier, Wednesday, Sept. 12, 1990, East Berlin, Germany. (AP Photo)

Two picture combo shows 1988 filer (top) of the grafitti-covered Communist wall close to the Brandenburg Gate in Berlin and a photo made during the Berlin rush hour (bottom) on Monday October 2nd 1995. (AP Photo/File/Jan Bauer(bottom)

A tourist takes photographs along the Berlin Wall Trail in Berlin, Germany, Oct. 6, 2009. The stones mark the spot, where the Berlin Wall used to stand. (AP Photo/Herbert Knosowski)

Photo taken at Bernauer Strasse 48 in Berlin, on Nov. 1, 2009 shows a photo of the spot as Eunice Kennedy Shriver bends over as she places a wreath at the West Berlin memorial for Ida Siekmann on June 26, 1963. (AP Photo/Franka Bruns)

Russian artist Dmitry Vrubel poses in front of his artwork showing East German leader Erich Honecker kissing Leonid Brezhnev, left, at Madame Tussauds in Berlin, Thursday, Nov. 5, 2009. (AP Photo/Franka Bruns)

In this Oct. 21, 2009 file picture German artist Gerald Kriedner paints at his picture on a segment of East Side Gallery in Berlin, Germany. (AP Photo/Markus Schreiber)

A worker walks through the reconstructed so called 'Death Strip' at the Wall Remembrance Memorial Bernauer Strasse in Berlin, Germany, Thursday, Nov. 5, 2009. (AP Photo/Markus Schreiber)