David and Francine Wheeler, parents of Sandy Hook Elementary School shooting victim Benjamin Wheeler, embrace during the gun violence conference in Danbury, Conn., on Thursday attended by Vice President Joseph R. Biden. Mr. Biden said politicians must speak for victims of gun violence who can no longer do so themselves. (Associated Press)

David and Francine Wheeler, parents of Sandy Hook Elementary School shooting victim Benjamin Wheeler, embrace during the gun violence conference in Danbury, Conn., on Thursday attended by Vice President Joseph R. Biden. Mr. Biden said politicians must speak for victims of gun violence who can no longer do so themselves. (Associated Press)