The Param Vir Chakra (PVC) is India’s highest military decoration awarded for the highest degree of valour or self-sacrifice in the presence of the enemy. The majority of the recipients, fourteen out of twenty one, were awarded posthumously.

Of the 21 awardees, 20 are from the Indian Army and one from the Indian Air Force.

Flying Officer Nirmal Jit Singh Sekhon is the only Air force officer who has received Param Vir Chakra.

source: http://en.wikipedia.org/wiki/Param_Vir_Chakra