Abstract: A ladder leveling device is attachable to a leg of a regular ladder having a joiner tongue affixed to the outer surface of said leg. Said device serves as an adjustable leg, having two sides, and a connector member between them that has slots extending diagonally therethrough adapted to receive said joiner tongue to thereby join my device to said ladder.

Abstract: A helicopter has a fuselage with a floor that has an opening therethrough. A rescue capsule is operably connected to the helicopter by cables and winches, and it has a projecting guide member that enters the floor opening to correctly align and stabilize the connection between the capsule and the helicopter. A bridge movably connected to the capsule provides egress between the latter and a building or other structure occupied by persons in need of rescue.