ation , ▁n arc ot ics , ▁or ▁document ▁fra ud ; ▁or ▁they ▁can ▁be ▁assigned ▁to ▁a ▁resident ial ▁intelligence ▁unit , ▁known ▁as ▁a ▁Field ▁Int elligence ▁Group ▁( FIG ). ▁H SI ▁agents ▁assigned ▁to ▁F IG s ▁generally ▁focus ▁on ▁Human ▁Int elligence ▁( H UM INT ) ▁collection . ▁ ▁International ▁Oper ations ▁ ▁International ▁Oper ations , ▁formerly ▁known ▁as ▁the ▁Office ▁of ▁International ▁Affairs ▁( O IA ), ▁is ▁a ▁sub component ▁of ▁H SI ▁with ▁agents ▁station ed ▁in ▁ 6 0 ▁locations ▁around ▁the ▁world . ▁H SI ' s ▁foreign ▁offices , ▁known ▁as ▁Att ach é ▁Off ices , ▁work ▁with ▁foreign ▁govern ments ▁to ▁identify ▁and ▁combat ▁trans n ational ▁criminal ▁organizations ▁before ▁they ▁threaten ▁the ▁United ▁States . ▁IO ▁also ▁facil it ates ▁domestic ▁H SI ▁investig ations ▁by ▁providing ▁intelligence ▁from ▁host ▁countries , ▁conduct ing ▁coll ater al ▁investig ations , ▁and ▁facil it ating ▁international ▁investig ations ▁conducted ▁by ▁field ▁offices ▁within ▁the ▁United ▁States . ▁ ▁Special ▁Response ▁Teams ▁Se vent een ▁H SI ▁field ▁offices ▁maintain ▁a ▁Special ▁Response ▁Team ▁( S RT ) ▁that ▁oper ates ▁as ▁a ▁federal ▁SW AT ▁element ▁for ▁the ▁office ' s ▁area ▁of ▁responsibility ▁( A OR ). ▁S RT ▁was ▁founded ▁under ▁the ▁U . S . ▁Custom s ▁Service ▁as ▁the ▁W arr ant ▁Entry ▁and ▁T act ical ▁Team ▁( W ET T ) ▁and ▁were ▁renamed ▁to ▁S RT ▁in ▁ 1 9