2 still critical as train, gas cleanup goes on near San Antonio. By Asher Price AMERICAN-STATESMAN STAFF Wednesday, June 30, 2004 An insidious cloud of chlorine gas, released after a horrific train wreck just southwest of San Antonio, dissipated over Central Texas on Monday. Before it vanished, however, three people had been killed and dozens injured as the rolling fog, like something out of a horror film, slid through the area. With major rail lines cutting through Austin and Central Texas, the transportation of such chemicals locally is common. But accidents such as the San Antonio one are rare, industry...