Burned in Zach Werenski’s memory is the first U.S. practice at the 4 Nations Face-Off last February. “You look around and see the skill,” Werenski said. “I was like, ‘This is fast.’ It’s wave after wave, player after player.” He and his countrymen fell short at that tournament, which was designed to be an appetizer of sorts for the return of NHL players to the Olympics . Over the summer, when the country’s best gathered again for an orientation camp ahead of next month’s Games in Milan, USA