Abraham Bolden, the first African American to serve on the White House detail guarding a president has a secret to share: Gross security lapses enabled President's John F Kennedy's murder in 1963.
More information about Abraham Bolden can be found here:
https://www.facebook.com/abraham.bolden
http://spartacus-educational.com/JFKbolden.htm
http://www.huffingtonpost.com/thom-hartmann/after-45-years-a-civil-ri_b_213834.html