Complex sentence: David and Yasmin make it to the airport a few minutes before 12:30, David shoves past security guards to Jena, who is beginning a welcoming speech, and knocks him to the ground just as bullets from Sloane's machine gun land where Jena was just standing.
Split into simpler sentences: David and Yasmin make it to the airport a few minutes before 12:30, where David shoves past security guards to Jena, who is beginning a welcoming speech. David knocks Jena to the ground just as bullets from Sloane's machine gun land where Jena was just standing.