Complex sentence: During the USAF's Red Flag advanced combat training exercises in 2008, American F-15Cs, F-16Cs, and F-22s bested Indian Su-30MKIs; the Su-30s reportedly operated with their radars in training mode to keep their signals secret.
Split into simpler sentences: During the USAF's Red Flag advanced combat training exercises in 2008, American F-15Cs, F-16Cs, and F-22s bested Indian Su-30MKIs. The Su-30s operated with their radars in training mode to keep their signals secret.