▁United ▁States ▁for ▁the ▁purposes ▁of ▁critical ▁infrastr ucture ▁protection , ▁border ▁pat rol , ▁" trans it ▁monitoring ", ▁and ▁general ▁surve ill ance ▁of ▁the ▁U . S . ▁population . ▁Miami - D ade ▁police ▁department ▁ran ▁tests ▁with ▁a ▁vertical ▁take - off ▁and ▁landing ▁U AV ▁from ▁H oney well , ▁which ▁is ▁planned ▁to ▁be ▁used ▁in ▁SW AT ▁operations . ▁Houston ' s ▁police ▁department ▁has ▁been ▁testing ▁fixed - wing ▁U AV s ▁for ▁use ▁in ▁" tra ffic ▁control ". ▁ ▁The ▁United ▁Kingdom , ▁as ▁well , ▁is ▁working ▁on ▁plans ▁to ▁build ▁up ▁a ▁fleet ▁of ▁surve ill ance ▁U AV s ▁r anging ▁from ▁micro - a er ial ▁vehicles ▁to ▁full - size ▁d ron es , ▁to ▁be ▁used ▁by ▁police ▁forces ▁throughout ▁the ▁U . K . ▁ ▁In ▁addition ▁to ▁their ▁surve ill ance ▁capabilities , ▁M AV s ▁are ▁capable ▁of ▁carrying ▁t as ers ▁for ▁" c row d ▁control ", ▁or ▁weapons ▁for ▁killing ▁enemy ▁combat ants . ▁ ▁Program s ▁such ▁as ▁the ▁H eter ogeneous ▁Aer ial ▁Re con na issance ▁Team ▁program ▁developed ▁by ▁D AR PA ▁have ▁autom ated ▁much ▁of ▁the ▁aer ial ▁surve ill ance ▁process . ▁They ▁have ▁developed ▁systems ▁consisting ▁of ▁large ▁teams ▁dr one ▁plan es ▁that ▁pilot ▁themselves , ▁automatically ▁decide ▁who ▁is ▁" s us p icious " ▁and ▁how ▁to ▁go ▁about ▁monitoring ▁them , ▁coordinate ▁their ▁activities ▁with ▁other ▁d ron