How the PM's dig at Mulcair sparked a #HarperHistory lesson

Don't mention the war. Or if you must, get your facts straight. Kady O'Malley tells the story of Harper's fact-fudging on NDP wartime history, and how his intended jab at Mulcair became fun social media fodder, trending on Twitter.

Question period barb Thursday prompts Twitter crowd to have some fun with 'history'