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Detail into the second stage adapter, taken from approximately Pos. III, looking north toward Pos. II. Fuel tank 2 is at left, with LOX tank 3 at right. Note the 7-inch LOX vent on the forward skirt of L3.

Picture 1 of 2.

This picture is exposed for the external portions of the stage.

Note the ends of the spider beam between the propellant tanks.