viz.

This poster is a political advertisement for the SVP (in English, the "Swiss People's Party"), a far-right political party in Switzerland that has made anti-immigration policies a centerpiece of its campaign in an upcoming election. The posters have been controversial: the tagline reads "to create security," and the image depicts three white sheep booting the black sheep from the swiss flag, presumably symbolic of Swiss territory.

“A Soviet Poster A Day” serves up images of Soviet propaganda posters with commentary. This site would be a great resource for anyone studying propagandistic images. Here’s an entry on the Five Year Plan:

Let's accomplish the plan of great deeds!
Klutsis G., 1930

Industrialization in Russia took off in 1929. It was based on a 5 year plan, which implied building of more than 1500 of industrial sites: factories, powerstations, mines, refineries. This was an ambitious plan, which was made even more impossible to carry out because of Joseph Stalin’s call out: “Five year plan in four years!” Nevertheless, the industrialization proved to be extremely successful with heavy industry output to increase 3 times in only 4 years. The zero-level unemployment level was reached in 1930. And although the first Five year plan was not implemented fully in time, during the second one Soviet Union surpassed all world countries except the USA in gross industry output. The country was turning from agriculture to industry as the main source of its power and wealth.

This poster was created by Gustav Klutsis - a pioneering photographer and major member of the Constructivist avant-garde in the early 20th century. He was one of the apologists of photomontage technique, he managed to bring to an impressive level.

via boingboing

Also via boingboing is this list of satrical, photoshopped propaganda posters from Worth1000. Most are quite funny. (Warning: some of the posters are mildly not suitable for work.)