MOSCOW - Three weeks remain in this World Cup, three more weeks of stoppage-time stunners, goalkeeping howlers and video-replay reversals until the billion-people-are-watching final kicks off at Luzhniki Stadium on July 15.A strong case can be made, though, that some of the most dramatic moments will play out over the next four days, perpetrated in some cases by teams that will head home by the end of the week.