'Lightning' Warns of Other Terrorists in the U.S.

Senior analyst for the Violence Policy Center Tom Diaz says one of the weapons found at the site of the Newtown, Conn. shooting was a variant of a type of gun developed for troops in Vietnam.

Senior policy analyst Tom Diaz at the Violence Policy Center, a non-partisan non-profit public policy institute working to reduce gun violence. He's the author of the new book, "Making a Killing: The Business of Guns in America" (The New Press). In the book, Diaz writes how in an attempt to increase profits, the gun industry has introduced more aggressive and lethal guns to the public. DIAZ says they do this free from regulation and under a cloak of secrecy.

The civil war in Syria is attracting fighters from all over, threatening the region's tenuous stability. Robert Malley of the International Crisis Group tells Fresh Air that "a war in Syria with regional spillover has now become a regional war with a Syrian focus."