It was the 199th mass shooting of the year so far in the United States: On Saturday, a gunman in Allen, Texas, opened fire at an outdoor shopping mall, killing eight people, three of whom were children.
But even as the bloodshed has prompted another push to increase restrictions on guns, a concurrent series of court battles have been wrestling with the question of where the constitutional right to “bear arms” ends — and where the government’s right to impose controls begins.
