Carlos McKnight waves a flag in support of same-sex marriage outside the Supreme Court. Jacquelyn Martin/AP hide caption

itoggle caption Jacquelyn Martin/AP

Human Rights Campaign, a national gay-rights group, launched a grass-roots effort to make the Deep South's culture more accepting of gays and lesbians. Brad Clark discusses the group's work in Mississippi. Rogelio V. Solis/AP hide caption

itoggle caption Rogelio V. Solis/AP