Defence Minister Shri Manohar Parrikar has urged the private construction companies to play a big role in developing the infrastructures along the border. Addressing a national workshop on Border Roads for private sector's participation in construction of roads, bridges and tunnels in Border Areas here today he said developing infrastructures along the border has become mandatory and private companies support is required in this regard. Shri Parrikar said that this is huge task and there are many challenges but these can be overcome by the use of modern techniques and materials.