The Prime Minister Dr. Manmohan Singh has said that there is a need to raise our voice against those who attempt to divide the society on communal lines. He said India is a multicultural and a multi- ethnic society and that the liberal outlook has to be strengthened. He was speaking at the presentation of the Indira Gandhi Award for National Integration on the martyrdom Day of Indira Gandhi in New Delhi yesterday. The award was given to Balraj Puri, a freedom fighter, a human rights activist and a well known journalist from Jammu and Kashmir.