LK Advani's rath yatra has hit a roadblock with the Indian Railways denying him permission to hold a meeeting at its ground in Chanadauli district of uttar Pradesh. Hitting out at the Centre-the BJP claims that this roadblock is an attempt by the centre to stall the BJP stalwart's yatra. BJP leader LK Advani took strong exception to the allegations that his yatra is linked to Prime Ministerial ambitions. Advani also demanded a white paper into the black money issue.