In this clip from Behind the Bima (full episode: https://www.youtube.com/watch?v=rup3RRJFJ0A), R. Yosef Mendelevich, renowned Refusenik and hero describes his wearing of a yarmulke, a symbol of Judaism and Jewish pride even in the most dark and difficult times in Russia.
For more, check out www.BehindtheBima.com.