By all accounts it was a huge success – the eyes of the world were on Germany as it held one of its biggest ever parties to mark the 20th anniversary of the fall of the Berlin Wall.Symbolic dominoes tumbled far more easily than the bricks of the real edifice, but they successfully represented the destruction of one of the cold war’s most potent images. The toppling foam panels, decorated by students who have grown up never living beneath the shadow of the barrier between East and West, illustrated the subsequent rapid collapse of communism throughout Europe. It was just one event on a day full of symbolism and reflection. Earlier, Germany’s Chancellor Angela Merkel had retraced her steps on the night the wall fell by crossing the first checkpoint to open 20 years ago. The festivities were capped with fireworks and a concert featuring music from Berlin’s State Opera.