Abstract: An improved door assembly is provided in the wall of a building. A full length door is mounted in an outer door frame by a plurality of primary hinges mounted in alignment along a first vertical axis. A partial length door is mounted within an opening defined entirely within the structure of the full length door by means of secondary hinges aligned along a second, vertical axis laterally spaced from the first. The partial length door is movable inwardly in rotation about the second vertical axis between open and closed positions relative to the full length door. A rigid link at least as long as the distance of separation between the primary and secondary vertical axes is secured to an interior wall surface within the building. The link releasably engages a catch on the partial length door, preferably through a hook and eye connection.