Two years after Reagan 's assassination , presidential protection is more comprehensive . Powerful explosives are among growing threats to presidential security . Shaddick says that more extensive information-gathering on potential presidential assailants has become possible in recent years , partly because of the rise of the internet . Agent who shadowed Reagan : Explosives now ` ` can blow a city block out . '' The author : ` ` They do n't want to be agents again . They just have to act ''
Two years after Reagan 's assassination , presidential protection is more comprehensive . Powerful explosives are among growing threats to presidential security . Agent who shadowed Reagan : Explosives now ` ` can blow a city block out . '' The author : ` ` They do n't want to be agents again . They just have to act ''