ADF air air-industry air-travel angles Australian-Defence-Forces blades defence exercises flight flying flyover formation height helicopter helicopters high manoeuvres military military-flyover perspectives rotors sky speed transport transportation travel traveling travelling asphalt bridge crossing junction overpass road steet viaduct blue column Coronado bridge roadway span steel traffic usa architecture building construction constructions enginering highway motorway scaffold underconstruction auto car motor over-pass pylon pylons warsaw way above aerial airservices arial colored colors coloured colours conditions fine looking-down observation patrol patrolling recon reconnaissance security views white aviation chopper copter equipment equipped lighting lights observing police police-helicopter surveillance pilot plane spitfire war