A gas turbine engine , comprising: a core engine ; a nacelle surrounding at least a portion of the core engine ; a bypass duct defined by and between the nacelle and the core engine and defining a fore-to-aft air flow conduit ; wherein the nacelle comprises: a translating cowl moveable between a first position and a second position ; a cascade element located within the translating cowl when the translating cowl is in the first position ; and multiple blocker doors , each of which is movable between a stowed position, where the blocker door is located within the translating cowl , and a deployed position, where the blocker door extends into the air flow conduit to deflect air through the cascade element ; a first actuator assembly mechanically coupled to the translating cowl and configured to selectively move the translating cowl between the first and second positions and expose the cascade element when the translating cowl is in the second position ; and a second actuator assembly mechanically coupled between the blocker doors and the cascade element and configured to selectively move each of the blocker doors between the stowed and deployed positions, wherein the second actuator assembly comprises: a sliding ring ; multiple link arms , wherein each link arm is pivotally mounted to the sliding ring and a respective one of the blocker doors ; and a linear actuator coupled to the sliding ring . a core engine ; a nacelle surrounding at least a portion of the core engine ; a bypass duct defined by and between the nacelle and the core engine and defining a fore-to-aft air flow conduit ; wherein the nacelle comprises: a translating cowl moveable between a first position and a second position ; a cascade element located within the translating cowl when the translating cowl is in the first position ; and multiple blocker doors , each of which is movable between a stowed position, where the blocker door is located within the translating cowl , and a deployed position, where the blocker door extends into the air flow conduit to deflect air through the cascade element ; a first actuator assembly mechanically coupled to the translating cowl and configured to selectively move the translating cowl between the first and second positions and expose the cascade element when the translating cowl is in the second position ; and a second actuator assembly mechanically coupled between the blocker doors and the cascade element and configured to selectively move each of the blocker doors between the stowed and deployed positions, a translating cowl moveable between a first position and a second position ; a cascade element located within the translating cowl when the translating cowl is in the first position ; and multiple blocker doors , each of which is movable between a stowed position, where the blocker door is located within the translating cowl , and a deployed position, where the blocker door extends into the air flow conduit to deflect air through the cascade element ; a first actuator assembly mechanically coupled to the translating cowl and configured to selectively move the translating cowl between the first and second positions and expose the cascade element when the translating cowl is in the second position ; and a second actuator assembly mechanically coupled between the blocker doors and the cascade element and configured to selectively move each of the blocker doors between the stowed and deployed positions, wherein the second actuator assembly comprises: a sliding ring ; multiple link arms , wherein each link arm is pivotally mounted to the sliding ring and a respective one of the blocker doors ; and a linear actuator coupled to the sliding ring . a sliding ring ; multiple link arms , wherein each link arm is pivotally mounted to the sliding ring and a respective one of the blocker doors ; and a linear actuator coupled to the sliding ring . <EOS>