WI: The War on Terror in the 70's

During the 1973, there was little known plot to place multiple car bombs across NYC to strike fear in American citizens. It was found out that the plotter was a member of Black September who filled the cars with Islamic propaganda posters. So what if he was successful destroying several buildings across New York. How would this affect the Nixon administration, America/Israeli relations, and Gaddafi's Libya who supported Black September from the start?
 
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