▁much ▁smaller ▁deployment ▁known ▁as ▁S entin el ▁as ▁a ▁" Ch inese ▁orient ed " ▁system . ▁ ▁The ▁President ▁also ▁offered ▁to ▁hold ▁off ▁construction ▁on ▁S entin el ▁if ▁the ▁S ovi ets ▁did ▁the ▁same . ▁As ▁the ▁S ovi ets ▁continued ▁construction ▁of ▁their ▁AB M ▁at ▁Moscow , ▁the ▁President ▁ordered ▁the ▁construction ▁of ▁the ▁first ▁S entin el ▁site ▁outside ▁Boston . ▁This ▁was ▁met ▁by ▁a ▁fir est orm ▁of ▁protest ▁on ▁the ▁part ▁of ▁local ▁citizens ▁who ▁were ▁not ▁happy ▁about ▁a ▁nuclear ▁miss ile ▁base ▁being ▁built ▁literally ▁in ▁their ▁back ▁yard . ▁ ▁The ▁incoming ▁President ▁N ixon ▁was ▁forced ▁to ▁real ign ▁the ▁system ▁to ▁something ▁more ▁similar ▁to ▁Hard site , ▁using ▁the ▁N ike - X ▁systems ▁for ▁the ▁defense ▁of ▁the ▁Min ut eman ▁fields ▁in ▁a ▁new ▁system ▁known ▁as ▁Saf egu ard . ▁This ▁placed ▁the ▁launch ▁sites ▁in ▁distant ▁locations ▁that ▁were ▁ ▁less ▁controvers ial . ▁ ▁In ▁the ▁midst ▁of ▁construction ▁of ▁the ▁first ▁two ▁Saf egu ard ▁sites , ▁the ▁S ovi ets ▁returned ▁to ▁the ▁negoti ations . ▁This ▁led ▁to ▁the ▁ 1 9 7 2 ▁Anti - B all istic ▁Miss ile ▁Tre aty , ▁limit ing ▁each ▁side ▁to ▁a ▁total ▁of ▁ 1 0 0 ▁inter ceptor ▁miss iles ▁located ▁in ▁up ▁to ▁two ▁AB M ▁bases , ▁and ▁am ending ▁that ▁to ▁only ▁one ▁base ▁in ▁ 1 9 7 4 . ▁The ▁S ovi ets