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 ''
Thirty years after Reagan 's shooting , presidential protection is more comprehensive . Powerful explosives are among growing threats to presidential security . Agent who shadowed Reagan : Explosives now `` can take a city block out . '' Book author : `` They do n't want to risk agents thinking . They just have to act ''