▁even ▁if ▁two ▁of ▁the ▁f uz es ▁failed ▁to ▁function , ▁the ▁third ▁would ▁trigger ▁det on ation . ▁Despite ▁this ▁elaborate ▁system , ▁at ▁least ▁one ▁T all boy ▁failed ▁to ▁expl ode ▁during ▁the ▁second ▁attack ▁on ▁the ▁Sor pe ▁dam ▁and ▁was ▁found ▁during ▁rep airs ▁in ▁late ▁ 1 9 5 8 ▁when ▁the ▁res er voir ▁was ▁em pt ied . ▁ ▁The ▁bomb ▁was ▁aim ed ▁at ▁the ▁target ▁during ▁an ▁operation ▁and ▁proved ▁capable ▁of ▁pen etr ating ▁deep ▁into ▁hard ened ▁rein for ced ▁concrete ▁when ▁it ▁hit . ▁This , ▁however , ▁was ▁not ▁the ▁primary ▁intention ▁of ▁Bar nes ▁Wall is ' s ▁design . ▁The ▁bomb ▁was ▁designed ▁to ▁make ▁impact ▁close ▁to ▁the ▁target , ▁pen et rate ▁the ▁soil ▁or ▁rock ▁beneath ▁or ▁around ▁the ▁target , ▁and ▁then ▁det on ate , ▁transfer ring ▁all ▁of ▁its ▁energy ▁into ▁the ▁structure , ▁or ▁creating ▁a ▁cam ou f let ▁( ca vern ▁or ▁cr ater ) ▁into ▁which ▁the ▁target ▁would ▁fall . ▁ ▁This ▁' ear th qu ake ' ▁effect ▁caused ▁more ▁damage ▁than ▁even ▁a ▁direct ▁hit ▁that ▁pen etr ated ▁the ▁arm our ▁of ▁a ▁target , ▁since ▁even ▁a ▁burst ▁inside ▁a ▁b unker ▁would ▁only ▁damage ▁the ▁immediate ▁surr ound ings , ▁with ▁the ▁bl ast ▁diss ip ating ▁rapidly ▁through ▁the ▁air . ▁An ▁earth qu ake ▁impact ▁shook ▁the ▁whole ▁target , ▁and ▁caused ▁major ▁struct ural ▁damage ▁to ▁all