The mass shooting in Connecticut appears to be reshaping the politics of gun control, with several ardent supporters of gun rights in Congress calling for steps to toughen the nation's weapons laws. Luke wonders if the shootings in Connecticut are changing the negotiating climate in Washington. // Two UW researchers say we might be living simulation a la "The Matrix." And they say they have a way to test the theory. We talk to University of Washington physics professor Martin Savage. // Luke and Dave Boze continue their conversation from earlier about the apparent shift in tone among many gun rights supporters in Congress. // MSNBC's Joe Scarborough is another who says he's rethinking his thoughts on gun control. Luke and Dave Boze discuss what it means.