We've all seen this iconic movie, but do you know the true story that inspired William P. Blatty to write the book then later the screenplay for this film?
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intro and outro music credit to
Love Turns Hate
background music credit:   Kevin MacLeod (incompetech.com)
Licensed under Creative Commons: By Attribution 3.0 License
http://creativecommons.org/licenses/by/3.0/