The BJP today reiterated that only a Joint parliamentary probe can do justice in the 2G spectrum scam. Addressing a rally Organised by NDA in New Delhi, senior BJP leader L K Advani accused the Congress government at the centre of covering up the corruption cases. He also criticised the Prime Miniser for failing to tackle price rise.BJP President Nitin Gadkari, senior party leaders Sushma Swaraj and Arun Jaitley, NDA constituents Janata Dal (United) leader Sharad Yadav, Shiv Sena leader Anant Gete and Akali Dal leader Ratan Singh Ajanala also spoke in the rally held at the Ram Lila Maidan. All the leaders demanded a JPC probe into the 2G scam, besides fair probe in Adarsh and CWG scams . Our correspondent reports, the NDA rally was held just two days after the Congress plenary where its leaders took turns to attack the BJP on issues ranging from right-wing terror to land scam in Karnataka.