The left wing and undercarriage of a P-51 Mustang. Passed for publication 28 Jul 1942. Printed caption on reverse: 'Flight Photograph No. Mus. 4. The inward-retracted undercarriage. Before the wheels can lie in their recesses in the wing the cowling opens in [order for the] wheel can[sic] pass. In this view the air [-to-air] inducted radiator under the body is also apparent.' Censor no: 212571. On reverse: FLIGHT, Approved for Issue, and (x2) US Army General Section Press & Censorship Bureau [Stamps].