system
Given the following post, respond as if you're commenting on Reddit:
human
[BTTF] What happened to the Lybian Terrorists?

Sure they crashed their van. But these guys were almost able to have a nuclear weapon on American soil. Did Doc and Marty just leave them there? Did they get arrested? What would the international fallout of having terrorists able to procure nuclear material identified and active in the U.S.
gpt
The Libyans in the timeline we see at the end of the movies were just actors hired by Doc to ensure Marty went back to 1955. Remember, the Doc in timeline-B worked with Marty in 1955 and got a letter about being shot by terrorists.  He worked out another way to get plutonium, but had to still have Marty travel back to 1955 thinking that Doc had been killed by terrorists, so he recreated the scenario that the original Marty experienced, creating a closed time loop.