Deputy Chief Mark Saunders speaks at a news conference in Toronto on Tuesday. A mysterious tunnel discovered in Toronto near one of the venues for this summer's Pan American Games contained a rosary with a crucifix and poppy. Police said there is nothing to suggest the tunnel was linked to criminal activity. Aaron Harris/Reuters/Landov hide caption

itoggle caption Aaron Harris/Reuters/Landov

Trucks move containers at the Port of Long Beach in California on Tuesday. Contract negotiations between dockworkers and shipping companies have led to a slowdown on the piers. Jae C. Hong/AP hide caption

itoggle caption Jae C. Hong/AP

A duplex where a 19-year-old man was found dead is shown in Timberlea, Nova Scotia, on Friday. Royal Canadian Mounted Police say they foiled a plot to commit a mass shooting. Reuters/Landov hide caption

itoggle caption Reuters/Landov

The Supreme Court of Canada, seen here in a welcoming ceremony last October, has overturned the country's ban on physician-assisted suicide. Chris Wattie/Reuters/Landov hide caption

itoggle caption Chris Wattie/Reuters/Landov

Former CBC host Jian Ghomeshi was arrested Wednesday and charged with four counts of sexual assault and one count of overcoming resistance by choking. Sonia Recchia/Getty Images hide caption

itoggle caption Sonia Recchia/Getty Images

Russian President Vladimir Putin looks to his side during the family photo session of the G-20 summit in Brisbane, Australia, on Saturday. Putin was sternly criticized by Western leaders over Moscow's involvement in eastern Ukraine. Rob Griffith/AP hide caption

itoggle caption Rob Griffith/AP

A makeshift memorial sits on a downtown street a block away from Canada's National War Memorial in Ottawa to remember Canadian soldier Nathan Cirillo, who was shot and killed by an assailant Wednesday. Warren Toda/EPA/Landov hide caption

itoggle caption Warren Toda/EPA/Landov

A Canadian soldier who was shot outside the war memorial on Parliament Hill in tended to in Ottawa on Wednesday. Daniel Thibeaut/CBC/Reuters /Landov hide caption

itoggle caption Daniel Thibeaut/CBC/Reuters /Landov

The Erebus and the Terror among icebergs, as illustrated in The Polar World by G. Hartwig in 1874. Sir John Franklin, British naval officer and arctic explorer, commanded the 1845 expedition of the ships to search for the Northwest Passage. All members of the expedition perished. G. Hartwig/Universal History Archive/Getty Images hide caption

itoggle caption G. Hartwig/Universal History Archive/Getty Images

Toronto Mayor Rob Ford, seen here in December 2013, announced Friday that he was withdrawing his re-election bid to seek treatment for an abdominal tumor. Chris Young/The Canadian Press hide caption

itoggle caption Chris Young/The Canadian Press

The Erebus and the Terror among icebergs, as illustrated in The Polar World by G. Hartwig in 1874. Sir John Franklin, British naval officer and arctic explorer, commanded the 1845 expedition of the ships to search for the Northwest Passage. All members of the expedition perished. G. Hartwig/Universal History Archive/Getty Images hide caption

itoggle caption G. Hartwig/Universal History Archive/Getty Images

Police officers take cover behind their vehicles in Moncton, New Brunswick, on Wednesday. Three police officers were shot dead and two others were injured in a shooting Wednesday night; Canadian police are searching for the suspected gunman. Ron Ward via the Canadian Press/AP/Moncton Times & Transcript hide caption

itoggle caption Ron Ward via the Canadian Press/AP/Moncton Times & Transcript

The World Trade Organization has maintained the EU's ban on products from Canada's seal hunt. Earlier this year, activists from PETA simulated slaughtering a seal in a protest at the Canadian Consulate in Los Angeles. Joe Klamar/AFP/Getty Images hide caption

itoggle caption Joe Klamar/AFP/Getty Images