New Delhi: It was a moment of irony when senior Congress leader P Chidambaram had to spend Wednesday night at the new Central Bureau of Investigation (CBI) headquarters in Delhi's Lodhi Road area which he as then union home minister had participated in its inauguration in 2011

The Congress leader, who was as Union Home Minister during November 2008 to July 2012 in the UPA government, was one of the key guests at the inauguration event of CBI headquarters which was held on June 30, 2011, in the presence of then Prime Minister Manmohan Singh.