FILE - In this March 22, 1996 file photo, children return to Dunblane Primary School, nine days after a gunman killed 16 children, their teacher and himself in Dunblane, Scotland. In Ma

 

              FILE - In this March 22, 1996 file photo, children return to Dunblane Primary School, nine days after a gunman killed 16 children, their teacher and himself in Dunblane, Scotland. In Ma
FILE - In this March 22, 1996 file photo, children return to Dunblane Primary School, nine days after a gunman killed 16 children, their teacher and himself in Dunblane, Scotland. In March 1996, a 43-year-old man named Thomas Hamilton walked into a primary school in this central Scotland town of 8,000 people and shot to death 16 kindergarten-age children and their teacher with four legally held handguns. In the weeks that followed, people in the town formed the Snowdrop campaign - named for the first flower of spring - to press for a ban on handguns. Within weeks, it had collected 750,000 signatures. By the next year, the ban had become law. (AP Photo/Pool-File)