President Pratibha Patil today left for New Delhi from Bhubaneswar after a three-day visit to Orissa.The President was seen off at the airport by Orissa Chief Minister Naveen Patnaik and senior officials. Mrs.Patil's visit had caused some anxious moments last evening as the rotor blade of the MI-17 IAF helicopter carrying her and other dignitaries hit an abandoned structure while taxiing after landing at the Bhubaneswar airport .<br/> <br/>Though the chopper became unstable for a few seconds and its blades got bent, all those on board were safe.<br/><br/><br/>