We Built The Wall?

From Yahoo News:
"Who built Berlin Wall? Most Russians don't know"

On the one hand I can not believe that 58% of Russians asked had no idea who built the Berlin Wall and on the other hand I know that certain historical facts seem to be forgotten or not taught in Russia - especially if it shows Russia/the USSR in a bad light,

The Berlin Wall was built by both the Soviet Union and East Germany in August 1961. The 20th anniversary of the Fall of the Wall is this month and as the Berlin Wall is a major symbol of the Cold War people (young and old) need to fully understand when it was built, who built it, why it was built, how many people died trying to flee over it, why it came down and when.

http://news.yahoo.com/s/nm/20091105/wl_nm/us_russia_wall_poll