▁to ▁be ▁secured ▁by ▁he fty ▁lock ing ▁mechan isms ▁to ▁overcome ▁internal ▁pressure . ▁ ▁A ▁number ▁of ▁acc idents ▁have ▁occurred ▁where ▁out ward - open ing ▁aircraft ▁doors ▁were ▁opened ▁in ▁flight , ▁often ▁accident ally : ▁ ▁American ▁Airlines ▁Fl ight ▁ 9 6 ▁( 1 9 7 2 ) ▁ ▁Turkish ▁Airlines ▁Fl ight ▁ 9 8 1 ▁( 1 9 7 4 ) ▁ ▁United ▁Airlines ▁Fl ight ▁ 8 1 1 ▁( 1 9 8 9 ) ▁ ▁See ▁also ▁▁▁ ▁H inge ▁b ender , ▁a ▁tool ▁for ▁adjust ing ▁door ▁h ing es ▁ ▁Bi omet rics ▁ ▁Cl osed - circ uit ▁television ▁ ▁Co al ▁hole ▁ ▁Do or ▁security ▁ ▁Double ▁margin ▁doors ▁ ▁Electron ic ▁lock ▁ ▁Identity ▁document ▁ ▁IP ▁camera ▁ ▁Jan us , ▁Roman ▁god ▁of ▁doors ▁ ▁Key cards ▁ ▁Lock sm ith ing ▁ ▁Lock ▁pick ing ▁ ▁Log ical ▁security ▁ ▁Notes ▁ ▁References ▁ ▁External ▁links ▁▁▁▁▁▁ ▁Category : Types ▁of ▁gates <0x0A> </s> ▁The ▁Central ▁Band ▁of ▁the ▁Mold ovan ▁Border ▁Police ▁( M old ovan : ▁Orchestra ▁Polit iei ▁de ▁Front iera , ▁Russian : ▁O р ке стр ▁По гра ни чной ▁поли ции ▁М В Д ▁Мо л дов ы ) ▁also ▁known ▁as ▁the ▁F an f ara ▁Pol i ție i ▁de ▁Front ier ă ▁is ▁a ▁Mold ovan ▁art istic ▁group ▁of ▁professional ▁who ▁represent ▁the ▁image ▁of ▁the ▁Mold ovan ▁Border ▁Police ▁through ▁their ▁cer