Article Photos: Conn. gun law seen as model for Congress, states 16/18

Mark Barden, center, father of Sandy Hook shooting victim Daniel Barden, hugs U.S. Sen. Richard Blumenthal, D-Conn., left, as Barden's wife Jackie, right, looks on at the conclusion of a legislation signing ceremony at the Capitol in Hartford, Conn., Thursday, April 4, 2013. The legislation signed by Connecticut Dannel P. Malloy at the ceremony adds more than 100 firearms to the state's assault weapons ban, sets eligibility rules for buying ammunition, and creates what officials have called the nation's first dangerous weapon offender registry. (AP Photo/Steven Senne)