"Wait, let me see that," Jake said, taking the two JFK papers. "This was one of the few bits of history I paid attention to, JFK was supposed to be assassinated in Dallas, but why change that? What could JFK not dying possibly achieve?"<br/><br/>"Bloody hell Jake," Lena replied. "Did you guys miss the lesson on the butterfly effect? I can explain it for you if you want," she said to Hannah, not wanting to leave her completely clueless as to what was happening.