Information Minister Hasanul Haq Inu, MP, said "Only historical and political research could establish the truth and nullify distortion of history, suppression of facts and lies."He was speaking at the Bangla Academy auditorium on Saturday on the 40th anniversary of A S M Shamsul Arefin`s research work. Arefin was a sub-sector commander during the Liberation War.Elaborating on the topic, Inu said "The research work of the Liberation War done by Researcher Shamsul Arefin, once again proves that Bangabandhu was the leader of the Liberation War. He was the brave heart while the Razakars were war criminals."Others who spoke on the occasion included, Civil Aviation and Tourism Minister Rashed Khan Menon, MP, State Minister for Foreign Affairs` Shahriar Alam, MP, Bangladesh Bank Governor Dr. Atiur Rahman, Abdul Wadud Dara, MP, Pankaj Devnath, MP, Litterateur Selina Hossain, Columnist Abed Khan, Journalist Soumya Bondopadhya and Drama Personality Nasiruddin Yousuf Bachchu.