DALLAS - More than 30 missing children have been "located, recovered, or rescued" in Texas by federal authorities after a month-long operation, including several teenagers deemed "critically missing" with ties to sex trafficking.The United States Attorney’s Office for the Northern District of Texas announced Wednesday the results of a Dallas-area investigation called "Operation Missing in the Metroplex," which said a total of 31 minors had been found.At least seven teenagers suspected to be victims of sex trafficking were rescued, ranging in ages from 13 to 17, authorities said.One teenager was found in an Uber during a prostitution ring, while another was found by Fort Worth Police at a "John’s" house, authorities said.