Complex sentence: Taylor shot down two dive bombers and landed at Wheeler Field to get additional 50 cal ammo, and as a flight of dive bombers began strafing Wheeler, both Welch and Taylor took off again.
Split into simpler sentences: Taylor shot down two dive bombers and headed for Wheeler Field to get additional.50 cal ammo. While his plane was being reloaded, a flight of dive bombers began strafing Wheeler, and Welch and Taylor quickly took off again.