President Barack Obama, accompanied by Vice President Joe Biden, talks about proposals to reduce gun violence at the White House in Washington. Obama has called for a ban on military-style assault weapons and high-capacity ammunition magazines and is pushing other policies in the wake of the mass shooting last month at an elementary school in Newtown, Conn. In response, gun-rights advocates have accused Obama and others of ignoring the Second Amendment rights of Americans.  (AP Photo/Charles Dharapak)