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How old is this pic?
Some history (I think) at: http://www.3rdattackgroup.org/a-26-b-26-invader.php

The Douglas A-26 Invader (designated B-26 between 1948 and 1965) is an American twin-engined light bomber and ground attack aircraft.

A re-designation of the type from A-26 to B-26 led to confusion with the Martin B-26 Marauder, which first flew in November 1940, some 20 months before the Douglas design's maiden flight.

see https://en.wikipedia.org/wiki/Douglas_A-26_Invader