On Wednesday Oct. 22 Cpl. Nathan Cirillo was shot and killed by an armed attacker while standing guard at the National War Memorial in Ottawa. The gunman then entered the main Parliament building where more shots were fired and where he was eventually shot and killed. As the events unfolded most of downtown Ottawa was in a state of lockdown as police scrambled to secure the area. These compelling images look back at the events of the week and the aftermath of the attack.
An officer runs across Wellington Street in downtown Ottawa as RCMP and police search for a gunman following reports of shots fired. (Cole Burston for The Globe and Mail)
In this still image taken from video surveillance Michael Zehaf Bibeau is shown carrying a gun while running towards Parliament Hill. (RCMP via The Canadian Press)
Armed RCMP officers approach Centre Block on Parliament Hill. (Chris Wattie/Reuters)
Police take cover near Parliament Hill. (Chris Wattie/Reuters)
The Conservative Party caucus room is shown shortly after shooting began. (Nina Grewal/Reuters)
An armed RCMP officer takes a position at the gate of 24 Sussex Drive, the official residence of the Prime Minister, after reports of a shooting at the National War Memorial. (Justin Tang/The Canadian Press)
Kevin Vickers, the Sergeant-at-Arms of the House of Commons, is shown in this still image taken from a CBC video in the Parliament's Hall of Honour carrying a gun. Vickers is credited with helping shoot dead the lone gunman. (CBC via The Canadian Press)
A bullet hole in the window of the rotunda of the Parliament buildings in Ottawa. (Chris Wattie/Reuters)
An office in a high-rise building overlooking Parliament Hill is empty as people are advised to stay away from windows after a gunman opened fire at the National War Memorial and the Parliament building. (Justin Tang/The Canadian Press)
People under lockdown look out of a downtown Ottawa office building as police searched for possible gunmen after a soldier was shot and killed and shots fired on Parliament Hill. (Justin Tang/The Canadian Press)
Armed police officers walk along Queen Street near Parliament Hill during a lockdown. (Justin Tang/The Canadian Press)
A weapon and personal belongings can be seen at the National War Memorial after a gunman shot and killed soldier Cpl. Nathan Cirillo. (Adrian Wyld/The Canadian Press)
Prime Minister Stephen Harper and his wife Laureen pay their respects to Cpl. Nathan Cirillo at the National War Memorial in Ottawa. (Chris Wattie/Reuters)
Members of Parliament applaud Sergeant-at-Arms Kevin Vickers during the reopening of Parliament on Thursday. Vickers is credited with helping shoot dead the lone gunman. (Jason Ransom/PMO via Getty Images)
Alex Babaris and Judith Zeller pay their respects to Cpl. Cirillo who was shot and killed by an attacker while on guard at the National War Memorial. (Fred Lum/The Globe and Mail)
A memorial in honour of Cpl. Cirillo outside of the Lieutenant-Colonel John Weir Foote Armoury in Hamilton. (Mark Blinch/Reuters)
Dogs peek out from under a gate at the Cirillo family home in Hamilton, Ontario near flowers and flags left by mourners for Cpl. Nathan Cirillo who was shot and killed by an attacker Wednesday in Ottawa. (Peter Power/The Canadian Press)
The hearse bearing Cpl. Nathan Cirillo makes it's way west along the Highway 401 section known as the Highway of Heroes en route to his hometown of Hamilton, Ontario. (Fred Lum/The Globe and Mail)