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The fleeting moments of unity

OTTAWA, CANADA - OCTOBER 23:  In this handout photo provided by the PMO, Prime Minister Stephen Harper (R) and all Members of Parliament applaud Kevin Vickers, Sergeant-at-Arms, during the reopening of Parliament on October 23, 2014 in Ottawa, Canada. The gunman, identified as Michael Zehaf-Bibeau, was shot and killed by Kevin Vickers while still inside the Parliament building.  (Photo by Jason Ransom/PMO via Getty Images)
OTTAWA, CANADA - OCTOBER 23: In this handout photo provided by the PMO, Prime Minister Stephen Harper (R) and all Members of Parliament applaud Kevin Vickers, Sergeant-at-Arms, during the reopening of Parliament on October 23, 2014 in Ottawa, Canada. The gunman, identified as Michael Zehaf-Bibeau, was shot and killed by Kevin Vickers while still inside the Parliament building. (Photo by Jason Ransom/PMO via Getty Images)