. ▁ ▁In ▁ 2 0 0 9 , ▁G 4 S ▁continued ▁to ▁ac quire ▁companies : ▁Sec ura ▁Monde ▁International ▁Limited ▁and ▁Sh ire mo or ▁International ▁Engineering ▁Limited , ▁together , ▁the ▁UK ' s ▁leading ▁special ist ▁bank note ▁and ▁high ▁security ▁technical ▁and ▁commercial ▁advis ory ▁companies ; ▁All ▁Star ▁International ▁for ▁$ 6 0 ▁million , ▁one ▁of ▁the ▁premier ▁facilities ▁management ▁and ▁base ▁operations ▁support ▁companies ▁providing ▁services ▁to ▁the ▁US ▁government ; ▁Ad esta , ▁US - based ▁provider ▁of ▁integrated ▁security ▁systems ▁and ▁communication ▁systems ; ▁and ▁Hill ▁& ▁Associ ates ▁Cons ult ants ▁Limited , ▁Asia ' s ▁leading ▁provider ▁of ▁special ist ▁risk - mit ig ation ▁consult ing ▁services . ▁The ▁V äst berga ▁hel ic opter ▁rob ber y ▁occurred ▁on ▁ 2 3 ▁September ▁ 2 0 0 9 ▁at ▁ 0 5 : 1 5 ▁C ET ▁when ▁a ▁G 4 S ▁c ash ▁service ▁dep ot ▁was ▁ro bb ed ▁in ▁V äst berga ▁in ▁southern ▁Stockholm , ▁Sweden . ▁In ▁the ▁aut umn ▁of ▁ 2 0 0 9 , ▁G 4 S ▁personnel ▁in ▁Australia ▁went ▁on ▁strike , ▁arg uing ▁that ▁the ▁company ▁had ▁subject ed ▁them ▁to ▁low ▁pay ▁and ▁poor ▁working ▁conditions . ▁The ▁strike ▁imper iled ▁the ▁operations ▁of ▁the ▁court ▁system ▁in ▁the ▁state ▁of ▁Victoria . ▁The ▁gu ards ▁provided ▁entry - point ▁screen ing ▁for ▁weapons ▁and ▁bomb s ▁in ▁both ▁the ▁County ▁Court ▁and ▁Mag istr ates