Representatives from Southeast Asian nations and business leaders of the country have pledged to contribute substantially for the socio-economic growth of the North East region at a two-day North East Business Summit here.New Delhi: The Congress, which suffered a huge defeat in the recently held Assembly elections, has reportedly roped in Japanese advertising and communication firm Dentsu and Burson-Marsteller to strategise the 2014 Lok Sabha polls campaign for Rahul Gandhi.Sify.com / News / National / India needs a PM, not a man-eater: Beni Prasad