Germany kicks off celebrations Friday marking the 25th anniversary of the epochal fall of the Berlin Wall, set to culminate with rock stars and veteran freedom activists joining a millions-strong crowd.Chancellor Angela Merkel, who grew up in communist East Germany, will lead three days of commemorations for those killed trying to flee the repressive state, leading up to a giant festival Sunday marking the joyous breach of Europe’s Cold War division on November 9, 1989.’I think you never forget how you felt that day -at least I will never forget it,’ Merkel, 60, said in a recent podcast.The festivities under the banner ‘Courage for Freedom’ will remember the peaceful revolution.