Complex sentence: A gun battle erupted with the hijackers and the Secret Service and the pilots attempt to land the plane at Ramstein Air Base in Germany, but are killed when the hijackers breach the cockpit and takes control, diverting the plane towards Kazakhstan.
Split into simpler sentences: A gun battle erupted between the hijackers and the Secret Service while the pilots attempt to land the plane at Ramstein Air Base in Germany. However, the pilots are killed when the hijackers breach the cockpit, after which they take control, diverting the plane towards Kazakhstan.