Every so often I find myself stepping into the minefield that is public discussion of guns, gun violence, gun control and how these things relate to the Second Amendment to the Constitution. Because of misleading public statements by the president of the United States and his secretary of state, it's now time to do so again. President Barack Obama said on April 16 that 90 percent of Mexico's recovered crime guns came from the United States. The comment came during a joint press conference with Mexican President Felipe Calderon addressing the raging violence south of the border, as Mexican drug...