In a development that could bring top industrialist Anil Ambani within the ambit of the 2G scam trial, the CBI has sought his inclusion along with wife Tina Ambani as witnesses in the ongoing trial in a special court. Anil Dhirubhai Ambani Group (ADAG) chairman Anil Ambani and Tina Ambani are among 70 news witnesses CBI wants to summon for examination in order to "strengthen" its case against the accused in the 2G spectrum allocation scam.