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After the Ottawa attack
By Reuters -

Sergeant-at-Arms Kevin Vickers makes his way to the House of Commons in Ottawa October 23, 2014. Photo: Reuters/Chris Wattie 

Bullet holes are pictured in the window of the Rotunda in the Parliament buildings in Ottawa October 23, 2014. Photo: Reuters/Chris Wattie

Cpl Nathan Cirillo is pictured in this handout photo taken from a group photo of the Canadian Army Contingent in front of the tomb of the Unknown Soldier in Ottawa on October 19, 2014, courtesy of The Canadian Armed Forces. Photo: Reuters/Corporal Melani Girard/The Canadian Armed Forces/Handout

Sergeant-at-Arms Kevin Vickers is applauded in the House of Commons in Ottawa October 23, 2014. Vickers was credited with shooting the suspect during a shooting incident October 22. Photo: Reuters/Chris Wattie

Bullet holes are pictured in the door to the room where the NDP holds caucus meetings on Parliament Hill in Ottawa October 23, 2014. Photo: Reuters/Chris Wattie

Prime Minister Stephen Harper and his wife Laureen Harper leave the Canada War Memorial after paying their respects to Cpl. Nathan Cirillo in Ottawa October 23, 2014. Cirillo was killed during a shooting incident at the Memorial October 22. Photo: Reuters/Chris Wattie

Canada's Sergeant-at-Arms Kevin Vickers is applauded in the House of Commons in Ottawa October 23, 2014. Photo: Reuters/Chris Wattie

Prime Minister Stephen Harper hugs Opposition Leader Thomas Mulcair in the House of Commons in Ottawa October 23, 2014. Photo: Reuters/Chris Wattie

A young woman wipes her eye after paying respects at the Canadian War Memorial in downtown Ottawa October 23, 2014. Photo: Reuters/Blair Gable

A security guard patrols the hallway near the entrance to the Parliamentary Library on Parliament Hill in Ottawa October 23, 2014 following a shooting incident October 22, in which a gunman killed a soldier and ran through Parliament shooting before being shot dead himself near the library. Photo: Reuters/Chris Wattie

Police officers search a man arrested after approaching police tape near the Canada War Memorial while Prime Minister Stephen Harper paid respect to Cpl. Nathan Cirillo at the Memorial in Ottawa October 23, 2014. Photo: Reuters/Chris Wattie

Flowers, mementos and well-wishes are placed at the Canadian War Memorial in downtown Ottawa October 23, 2014. Photo: Reuters/Blair Gable

Prime Minister Stephen Harper shakes hands with Sergeant-at-Arms Kevin Vickers in the House of Commons in Ottawa October 23, 2014. Photo: Reuters/Chris Wattie

The Canadian flag flies at half mast on the Peace Tower in Ottawa October 23, 2014. A gunman attacked Canada's parliament on Wednesday, with gunfire erupting near a room where Prime Minister Stephen Harper was speaking, and a soldier was fatally shot at a nearby war memorial, jolting the Canadian capital. Photo: Reuters/Blair Gable

A police dog and an officer inspect flowers laid by Liberal Leader Justin Trudeau and others at the Canadian War Memorial in downtown Ottawa October 23, 2014. Photo: Reuters/Blair Gable

Security personnel guard the area around the Canadian War Memorial from a rooftop in downtown Ottawa October 23, 2014. Photo: Reuters/Blair Gable

Canada's Liberal Leader Justin Trudeau walks to a crowd of onlookers after laying flowers at the Canadian War Memorial in downtown Ottawa October 23, 2014. Photo: Reuters/Blair Gable 

Police officers bring flowers to the Canadian War Memorial in downtown Ottawa October 23, 2014.
Photo: Reuters/Blair Gable

Evidence markers are seen on the ground at the Canadian War Memorial in downtown Ottawa October 23, 2014. Photo: Reuters/Blair Gable

Police perform a thorough search of the area around the Canadian War Memorial in downtown Ottawa October 23, 2014. Photo: Reuters/Blair Gable

A man wipes a tear from his eye after paying his respects at the Canadian War Memorial in downtown Ottawa October 23, 2014. Photo: Reuters/Blair Gable

A combination photograph shows Prime Minister Stephen Harper and his wife Laureen Harper ducking under police tape, then retreating behind it as they attempt to pay their respects at the Canada War Memorial in Ottawa October 23, 2014. The pair was pulled back behind the tape when it was pointed out the memorial was still a crime scene. Photo: Reuters/Chris Wattie