Hindustan Times | CBI probes SP Tyagi's 4 Noida-based firms, looks into passport details Hindustan Times CBI on Tuesday quizzed former IAF chief SP Tyagi on the four firms he and his wife set up after he retired. (PTI). Share. Share. Share. Share. On the second day of his interrogation in the AgustaWestland chopper deal, the CBI on Tuesday quizzed former ... AgustaWestland deal: Ex-IAF chief Tyagi 'admits' he met Finmeccanica amid chopper talks VVIP Chopper scam: SP Tyagi had met Finmeccanica COO while in office as IAF chief, says CBI AgustaWestland: CBI to question ex-IAF chief Tyagi for third day |