CURBING GUN VIOLENCE<br><br> In the aftermath of the mass shooting at an elementary school in Newtown, Connecticut, the Obama administration and the US Congress have proposed a series of measures to curb gun violence. Jim Kessler, co-founder and Senior Vice President for Policy at Third Way, and Harry L. Wilson, Director of the Institute for Policy and Opinion Research at Roanoke College and author of “Guns, Gun Control, and Elections: The Politics and Policy of Firearms,” spar over the prospects for and impediments to federal gun laws with host Carol Castiel.