&O  A8;0  ;0A8G=>W  4>18,   O:C  28:;8:0T  @5A,   701>@>=OT  2>@>3>2V  B@5=C20B8  =>28E  2>W=V2  C  2V9AL:>28E  1C4V2;OE,   @>7B0H>20=8E  C  7>=V  WW  4VW.   D5:B  =5  ?>H8@NTBLAO  =0  A>N7=V  2V9AL:0  B0  3>A?>40@AL:V  1C4V2;V,   =0?@8:;04,   <VAL:V  F5=B@8. 
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 )>18  A:>@8AB0B8AO  FVTN  A8;>N,   =0B8A=VBL    =0  ?V:B>3@0<C  " ?V45<VO"   23>@V  5:@0=0,   0  ?>BV<     =0  ?>B@V1=5  <VAF5  =0  <0?V  2  <560E  20H>W  < l i n k = " t o p i c : l i n e   o f   s i g h t " > 7>=8  2848<>ABV< / l i n k > . 