Ambassador Eduardo Medina Mora said Thursday that the mass shooting of school children in Newtown, Connecticut, last month had raised outrage to the point where previously unfeasible legal changes may be possible. .... Mexico says U.S. guns, particularly assault weapons, help fuel drug cartel-related violence south of the border. Medina Mora says he hopes the Newtown shooting will, in his words, "catalyze the necessary societal support for a change in the regulations that will be more favourable to the interests of our country."