U.S. Politics Video: Candidates debate moon plans Add to ... AP Video Published Friday, Jan. 27, 2012 5:08AM EST Last updated Friday, Jan. 27, 2012 5:08AM EST The Republican presidential candidates sparred over Newt Gingrich's ideas about putting a colony on the moon. Watch More Video: Trump is creating a 'nightmare scenario' for the GOP Freight train derails, catches fire in Tennessee Is the European Union divided over Greece? BP to pay $18.7-billion after 2010 Gulf of Mexico spill A glimpse at Canada’s least-visited national park Black church fires investigated across southern U.S. Animal control officers say dogs too often left in hot cars Foreign tourists say 'Cuban ethos' may fade with American influx South Korean 'comfort women' take protest to U.S. Sears Canada CEO steps down Macy's follows NBC, cuts ties with Donald Trump Report says Taiwan crash pilot 'pulled the wrong throttle' Why do Canadians say 'sorry' so much? Ferry sinks off Philippines, dozens dead Washington wildfire destroys least 23 homes Germany is playing 'dangerous game of chicken,' analyst says Obama, Brazilian president discuss countries' relationship Raw video of pro-Europe rally outside Greek parliament Obama: Greek crisis won't cause 'major shock' to U.S. financial system Watch how Brian Gable created our Canada Day cartoon Comments AA More Related to this Story Video: The Globe's Affan Chowdhry explains why Florida matters in the 2012 race Video: Romney gets aggressive in Florida debate Video: Romney calls Gingrich attacks on him 'repulsive'