LAS VEGAS >> The Washington Capitals will play for a Stanley Cup championship Thursday night for the first time in 43 NHL seasons. Alex Ovechkin is one win away from carving his name into history at the peak of his incredible hockey career.With a 3-1 lead in the Stanley Cup Final and a city thousands of miles away thirsting for its first championship in a generation, the Vegas stakes are awfully high for the Caps in Game 5.