Next week is the 25th anniversary of the fall of the Berlin Wall that separated Germany's communist East from the U.S.-friendly West.

We want to know how much do you know about the historic event, so we're dedicating this week's crossword puzzle entirely to the subject.

The rules of the puzzle are the same. The clock starts when you click the "START" button. The target time to complete this puzzle is 15 minutes. To see how scoring works, read this post.