General Bipin Rawat, India's 1st Chief of defense staff is no more. Gen Rawat, wife Madhulika Rawat, and 11 others died in a tragic crash of Mi-17V5 helicopter in Coonoor, Tamil Nadu on Wednesday. Only Group captain Varun Singh survived the crash. Mi-17V5 choppers joined the Indian Air Force fleet in February 2012. Watch the video to know more.