Please go through your articles before posting it and making a fool of yourself. For ex. you have said that the BIAL is a consortium of 3 companies: Siemens, Zurich Airport and "Lauren & Toubro Ltd". Whereas its a consortium b/w Siemens, Zurich Airport and "Larsen & Toubro Ltd". L&T is the biggest engineering company in India and takes up almost all the major construction projects including HIAL, MIAL, DIAL, Delhi Metro to name a few. SHARPEN YOUR GENERAL KNOWLEDGE ABOUT YOUR COUNTRY FIRST!!!!