David Cameron stumped by Letterman's British history quiz Add to ... AP Video Published Thursday, Sep. 27 2012, 6:44 AM EDT Last updated Thursday, Sep. 27 2012, 10:36 AM EDT British Prime Minister David Cameron's appearance on Late Show with David Letterman is making waves back at home, after Cameron struggled in Letterman's surprise British history quiz. Watch More Video: David Cameron stumped by Letterman's British history quiz Frothy UK markets perfect for flurry of great value IPOs - Hewson Canada-Korea free-trade agreement: First of many? Migrant entrepreneurs prove their worth Listen in on Sarah Palin's conservative story time Former Don Bosco football player signed to CFL team thanks Mayor Rob Ford Donald Trump predicts Hillary Clinton will be Democratic nominee for 2016 London benefits from rise in ultra rich "You wanna lose elections? Stand for nothing" -- Cruz at CPAC Could low U.K. rates end up costing? Nik on the Numbers: Explaining the most recent Quebec polling numbers Who is and who isn't talking separatism during the Quebec election Doug Ford gives unclear answer about Jimmy Kimmel apology Doug Ford says 'nice guy' Jimmy Kimmel better than Toronto media How has this severe winter affected U.S. jobs data? Five sports teams that UBC will cut Why Harper really needs the Canada Job Grant deal to work British Airways parent flies back to profit More talk, no action from China's congress? Police Chief Bill Blair 'deeply offended' by Rob Ford's name-calling No cigars for some but Cuba's on a roll Comments AA More Related to this Story Video: U.K. PM Cameron talks politics on Letterman Video: Ann Romney pays visit to Leno Video: Obama: Romney hasn't 'gotten around a lot'