In aftermath of yesterday's gas explosion at a Mexico City maternity and children's hospital that left 3 dead and 73 injured, 39 persons still remain hospitalized, 18 in serious condition. Authorities have ordered an investigation, and thus far three gas company workers have been detained, charged with negligent manslaughter and damages. Questions are being raised on why the chaotic gas industry is not property regulated. Clayton Conn reports from Mexico City. teleSUR