In addition to causing horror and outrage, Friday's shooting deaths by
Adam Lanza of 27 people, including 20 school children, in Sandy Hook,
Conn., are already prompting calls for new gun laws. Supporters of gun
control demand restrictions on ammunition magazines and bans on
so-called assault weapons—semiautomatic versions of military firearms.
Gun-rights advocates see another mass shooting in a "gun-free zone" and
argue for expanding the places where individuals with valid permits may
carry their weapons.