▁Transport ation ▁Security ▁Administration ▁( T SA ) ▁to ▁I CE , ▁but ▁Michael ▁Cher to ff ▁moved ▁them ▁back ▁to ▁the ▁T SA ▁in ▁ 2 0 0 5 . ▁ ▁In ▁April ▁ 2 0 0 6 , ▁I CE ' s ▁Cy ber ▁Cr imes ▁Center , ▁Child ▁Exp lo itation ▁Section , ▁initi ated ▁an ▁investigation ▁into ▁criminal ▁organizations ▁that ▁distributed ▁child ▁por n ography . ▁The ▁project , ▁dub bed ▁Operation ▁F lick er , ▁found ▁that ▁there ▁were ▁a ▁number ▁of ▁government ▁employees , ▁including ▁" do z ens ▁of ▁Pent agon ▁staff ▁and ▁contract ors ▁with ▁high - level ▁security ▁clear ance ," ▁who ▁had ▁downloaded ▁child ▁por n ography . ▁The ▁investigation ▁was ▁closed ▁" based ▁upon ▁the ▁lack ▁of ▁participation " ▁by ▁I CE ▁officials . ▁ ▁Organ ization ▁U . S . ▁Im m igration ▁and ▁Custom s ▁En for cement ▁is ▁responsible ▁for ▁ident ifying ▁and ▁elimin ating ▁border , ▁economic , ▁transport ation , ▁and ▁infrastr ucture ▁security ▁vulner abilities . ▁There ▁is ▁an ▁estimate ▁of ▁about ▁ 2 0 , 0 0 0 ▁I CE ▁employees ▁in ▁approximately ▁ 4 0 0 ▁offices ▁within ▁the ▁United ▁States ▁and ▁ 5 3 ▁countries . ▁ ▁The ▁organization ▁is ▁composed ▁of ▁two ▁law ▁enfor cement ▁director ates ▁( H SI ▁and ▁E RO ) ▁and ▁several ▁support ▁divisions ▁each ▁head ed ▁by ▁a ▁director ▁who ▁reports ▁to ▁an ▁Executive ▁Associ ate ▁Director . ▁The ▁divisions ▁of ▁I CE ▁provide ▁investigation , ▁inter