Six US F-35 stealth fighters trained with the IAF in India — but their cockpits and sensitive systems remained off-limits. The twist? India did something similar with its Su-30 MKIs during Red Flag 2008. So what did the IAF learn from the F-35 — and could it help against China’s J-20? @prasadaditi Watch: #F35# #IndianAirForce# #IAF# #TarangShakti# #Su30MKI# #USAirForce# #Rafale# #Tejas# #J20# #IndiaUS#