The Toronto Maple Leafs and Ottawa Senators were due to play on Wednesday night. They did not because downtown Ottawa came under siege earlier in the day, when a gunman shot and killed a solider at the National War Memorial before the gunman was shot and killed inside the Canadian Parliament building.
They sang to a performance of “O Canada,” which isn’t played before games featuring two American teams despite the majority of players being Canadians.
Here's another vantage point from Sean Gentille of the Sporting News from the press box:
Truth be told, we were expecting one of those “anthem singer drops out to allow fans to carry the tune” moments, which he did during “The Star Spangled Banner” that followed. But it’s the thought that counts, and this was a truly thoughtful moment from these two rivals.