BJP today said the arrest of former Air Chief S P Tyagi and two others in VVIP chopper deal case shows the CBI's independence during the NDA rule.<br/><br/>Talking to media in New Delhi, party Secretary Sidharth Nath Singh said, it is the same CBI which was termed as caged parrot by the Supreme Court. He said the agency has now out from the cage. <br/><br/>Mr. Singh said the law is taking its own course in the corruption cases which were somewhere held up by the political masters earlier. <br/><br/>He asserted that the NDA government has zero tolerance against corruption.