Former Polish President Lech Walesa, center, is hit by a cameraman on a vehicle after he pushed the first domino block on the corner of the Reichstag in Berlin, Monday, Nov. 9, 2009, during the commemorations of the 20th anniversary of the fall of the Berlin Wall on Nov.9, 1989. AP Photo logo AP Photo 27 months ago

Former Polish President Lech Walesa, center, is hit by a cameraman on a vehicle after he pushed the first domino block on the corner of the Reichstag in Berlin, Monday, Nov. 9, 2009, during the commemorations of the 20th anniversary of the fall of the Berlin Wall on Nov.9, 1989.