''SAN ANTONIO - A group of South Texas parents say they are being denied their children's birth certificates. The allegation from 17 families has resulted in a lawsuit against the Texas Department of State Health Services filed by the Texas Rio Grande Legal Aide and the South Texas Civil Rights Project. TRLA is representing 19 adults from Cameron, Hidalgo and Starr counties while the TCRP is representing the 23 children, according to court documents. "It is absolutely illegal. The federal government Constitution says anyone born within the U.S is entitled to privileges and immunities of U.S citizenship," TCRP senior attorney...