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齐发国际娱乐:FlowersarelaidatthesceneafteranattackonWestminsterBridgeinLondon,Britain,March22,2017.[Photo/Agencies]TheLondonattackonMarch22inwhichfivepeople,includingtheattackerandapoliceman,werekilledand40injuredisanotherpotentwarningagainstterrorism.TheUnitedKingdomhasbeentighteningitssecuritymeasuresafterthe2005terroristattackinLondonthatclaimedmorethan50lives.Themeasuresincludesharinginformationwithothercountries,strengtheningthepoliceforce,aswellasprovidingprofessionaltrainingtocounter-terrorismforces.But,astheMarch22attackshowed,itisstilldifficultevenforacountrywiththetightestsecuritytopreventaterroristattack.Lastweek'sLondonattackalsoshowednewtrendsinterrorism,suchas"lonewolf"attacks.These"lonewolves"aresometimeshelpedbyoneortworesidentstolaunchattacksonunsuspectinginnocentpeople.Thenumberoflonewolfattackshasbeenrisingsince2000.InMay2013,twoterroristskilledasoldierinLondon;inMarchthisyear,aman,lateridentifiedasanextremist,wasshotdeadwhiletryingtosnatchtheweaponofafemalesolideratOrlyAirportinFrance.Allthosewereso-calledlone-wolfattacks.Withmorecountriesimposinggreaterrestrictionsonpossessionofgunsandexplosives,terroristsareusingeasy-to-gettoolstolaunchattacks.Drivingvehiclesintocrowdsandgoingonstabbingspreeshavebecometheirpreferredmethodstospreadpanicamongthepeople.BackinJune2007,terroriststriedtoattackGlasgowInternationalAirportwithanSUVloadedwithgascannisters;inDecemberlastyear,aterroristdroveatruckintoChristmasshoppersinBerlin,killing12peopleandinjuringover50;fivemonthsbeforethat,anothermandroveatruckintocrowdscelebratingBastilleDayontheNicepromenade,killing86peopleandleaving434injured.Eveninthelastweek'sLondonattack,theterroristusedavehicletoattackpedestriansonWestminsterBridgemetersawayfromtheBritishparliamentbuilding.Anotherstrikingfeatureoftherecentterroristattacksisthetargets:landmarkbuildingswherelargenumbersofpeopleassemble.WestminsterPalaceinLondonisthelatestexample.Terroriststargetsuchstructuresbecausetheybelieveanattackonanyoneofthemwilldealapsychologicalblowtothegovernmentandthepeople.

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