If President Kennedy was protected by Agent DeProspero, the president would have survived Dallas; pure and simple. Bob did not join the Secret Service until 1965 but did so in response to the assassination. Bob protected Presidents and Vice Presidents from LBJ-Reagan.
SURVIVOR'S GUILT:
http://www.amazon.com/Survivors-Guilt-Service-Failure-President/dp/1937584607/ref=sr_1_1?ie=UTF8&qid=1373914997&sr=8-1&keywords=vince+palamara
JFK: FROM PARKLAND TO BETHESDA:
http://www.amazon.com/JFK-Parkland-Bethesda-Assassination-Compendium/dp/1634240278/ref=pd_sim_14_1?ie=UTF8&dpID=515AE4ngi-L&dpSrc=sims&preST=_AC_UL160_SR107%2C160_&refRID=1F2Q0S191RBAMFE01Q1M
Robert DeProspero: in the Secret Service 1965-1986
Simpy the best!
