Advanced Light Helicopters (ALH) of the Indian Air Force"s Sarang aerobatics team perform during the celebration of 77th anniversary of Indian Air force at Hindon Air Force base at Ghaziabad in Uttar Pradesh on Thursday, October 08, 2009.

Photographer: A Sarthak

Tags: HelicopterChopperAdvanced Light HelicopterIndian Air Force HelicopterSarang HelicopterIAFIAF ParadeIndian Air Force Day ParadeAir ForceIndian Air ForceAir ForceIndian Air ForcePhoto Stock