The FBI is announcing the arrest of a San Antonio man who threatened a mass killing at a conservative youth gathering in Florida. A federal complaint says 19-year-old Alejandro Gomez made social media posts threatening Turning Point USA's Student Action Summit in Tampa last month. Gomez bought a plane ticket from Austin to Tampa, but canceled his trip. When agents arrested Gomez, they found child pornography in his cell phone. Gomez faces charges of threatening interstate communications and possession of child porn.