CBS LAS VEGAS- Although gun control legislation failed in the Senate earlier this week, its supporters vow to try again. The legislation was drawn up after the Sandy Hook Elementary School massacre. Among other things, it would have expanded background checks. Many Sandy Hook parents lobbied senators in person. Erica Lafferty, Daughter of Dawn Hochsprung the Principle at Sandy Hook Elementary, talks about how she felt when the Senate’s gun bill didn’t pass yesterday. Are grieving Newtown family members wrong to advocate for stricter gun laws? Callers tell us if it’s right or wrong.