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

Farley Mowat arrives on the Red Carpet outside the Canon Theatre during the 2010 Canada Walk of Fame Tribute in downtown Toronto, Ontario, in October 2010. Mowat died Tuesday at age 92. Heinz Ruckemann/UPI/Landov hide caption

itoggle caption Heinz Ruckemann/UPI/Landov

Royal Canadian Mounted Police investigators canvass the London, Ontario, neighborhood around the home of Stephen Solis-Reyes, who has been charged in connection with exploiting the "Heartbleed" bug. Geoff Robins/Reuters/Landov hide caption

itoggle caption Geoff Robins/Reuters/Landov

U.S. and Canadian fans attend the women's hockey gold medal game in Sochi Thursday. A recent Gallup poll finds that Americans see Canada in the most favorable light, compared to other countries. Bruce Bennett/Getty Images hide caption

itoggle caption Bruce Bennett/Getty Images

Plants for auction at GCSurplus, the Canadian Government's site for the sale of surplus goods. Plants from the House of Commons may soon join them. Courtesy of Public Works And Government Services Canada hide caption

itoggle caption Courtesy of Public Works And Government Services Canada

Jan. 23: Ice covers the remains of a home for seniors in L'Isle-Verte, Quebec. A fire there killed at least 27 people. Authorities fear another five people also died. Remi Senechal/AFP/Getty Images hide caption

itoggle caption Remi Senechal/AFP/Getty Images