#OttawaStrong hashtag emerges after shooting

Following a shooting on Parliament Hill in Ottawa on Oct. 22, which killed soldier Cpl. Nathan Cirillo, many took to Twitter to show their support. Thousands used the hashtags "#OttawaStrong" and "#CanadaStrong". Here's a compilation of some of the best tweets:

  1. The Pittsburgh Penguins paid tribute to their neighbours to the north by performing O Canada prior to their game against the Philadelphia Flyers on Wednesday night.
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