Today is the 20th anniversary of the fall of the Berlin Wall, a complex security structure that once divided East and West Berlin in Germany. 
Leo ni Kumbukumbu ya 20 ya kuanguka kwa Ukuta wa Berlini, kizingiti madhubuti cha kiusalama ambacho kiliwahi kuligawa jiji la Berlini katika pande mbili za Mashariki na Magharibi huko Ujerumani.