Target Practice in Dealey PlazaFrom Mafia Kingfish by John Davis (paperback Signet Books edition, 1989)That same morning [Wednesday, November 20, 1963], in the center of Dallas, two police officers on routine patrol entered Dealey Plaza, through which the presidential motorcade would pass on Friday, and noticed several men standing behind a wooden fence on a grassy knoll overlooking the plaza. The men were engaged in mock target practice, aiming rifles over the fence, in the direction of the plaza. The two police officers immediately made for the...