During Tuesday's commemoration, Polish Prime Minister Donald Tusk indirectly referred to the controversy with Russia and the German invasion.

VOA: standard.2009.09.01

At the site where the commemoration was to take place a funeral service was held with people, some of them crying, saying prayers for those who died.

VOA: standard.2010.04.10

He visit Russian for the 50th anniversary commemoration of the U2 incident.

VOA: standard.2010.05.07

Clinton's keynote speech at a dinner organized by the Atlantic Council was more an appeal for unity among the expanded NATO alliance than a commemoration of the transformative events in Berlin two decades ago.

VOA: standard.2009.11.09