![The crew of an M-3 tank learn all the ways of causing trouble for the Axis with a 75-mm. gun, a 37-mm. gun and four machine guns, Fort Knox, Ky. The Fort Knox School for tank crews has graduated many men who are now ready to meet the enemy on our far flung battle lines -- and on more than equal terms. [Tank] commander](https://cdn4.picryl.com/photo/1939/01/01/the-crew-of-an-m-3-tank-learn-all-the-ways-of-causing-trouble-for-the-axis-640.jpg "The crew of an M-3 tank learn all the ways of causing trouble for the Axis with a 75-mm. gun, a 37-mm. gun and four machine guns, Fort Knox, Ky. The Fort Knox School for tank crews has graduated many men who are now ready to meet the enemy on our far flung battle lines -- and on more than equal terms. [Tank] commander")
Civil Air Patrol Base, Bar Harbor, Maine. Ground crew making a routine...
Photograph shows the Stinson HW-75, or 105 Voyager airplane. The design was later modified to the L-5 Sentinel for the war. (Source: Flickr Commons project, 2011)
![Workers on the Liberator Bombers, Consolidated Aircraft Corp., [Fort Worth, Texas]](https://cdn4.picryl.com/photo/1939/01/01/workers-on-the-liberator-bombers-consolidated-aircraft-corp-fort-worth-texas-640.jpg "Workers on the Liberator Bombers, Consolidated Aircraft Corp., [Fort Worth, Texas]")
![Member[s] of the experimental staff at the North American Aviation, Inc., plant, observe wind tunnel tests on an accurate scale model of the B-25 ("Billy Mitchell") bomber, Inglewood, Calif. This plant produces the battle-tested B-25 bomber, used in General Doolittle's raid on Tokyo, and the P-51 Mustang fighter plane which was first brought into prominence by the British raid on Dieppe](https://cdn4.picryl.com/photo/1939/01/01/members-of-the-experimental-staff-at-the-north-american-aviation-inc-plant-640.jpg "Member[s] of the experimental staff at the North American Aviation, Inc., plant, observe wind tunnel tests on an accurate scale model of the B-25 (\"Billy Mitchell\") bomber, Inglewood, Calif. This plant produces the battle-tested B-25 bomber, used in General Doolittle's raid on Tokyo, and the P-51 Mustang fighter plane which was first brought into prominence by the British raid on Dieppe")
![Marine Corps Major in dress white uniform, W[orld] W[ar] II](https://cdn4.picryl.com/photo/1939/01/01/marine-corps-major-in-dress-white-uniform-world-war-ii-640.jpg "Marine Corps Major in dress white uniform, W[orld] W[ar] II")
![Mounting motor [on a] Fairfax B-25 bomber, at North American Aviation, Inc., plant in [Inglewood], Calif.](https://cdn4.picryl.com/photo/1939/01/01/mounting-motor-on-a-fairfax-b-25-bomber-at-north-american-aviation-inc-plant-640.jpg "Mounting motor [on a] Fairfax B-25 bomber, at North American Aviation, Inc., plant in [Inglewood], Calif.")
![Making wiring assemblies at a junction box on the fire wall for the right engine of a B-25 bomber, North American Aviation, Inc., [Inglewood], Calif. Forward of this wall will be mounted one of the two 1,700-horsepower Wright Whirlwind engines which carry the B-25 through performances up to Altitudes of 25,000 feet](https://cdn4.picryl.com/photo/1939/01/01/making-wiring-assemblies-at-a-junction-box-on-the-fire-wall-for-the-right-engine-640.jpg "Making wiring assemblies at a junction box on the fire wall for the right engine of a B-25 bomber, North American Aviation, Inc., [Inglewood], Calif. Forward of this wall will be mounted one of the two 1,700-horsepower Wright Whirlwind engines which carry the B-25 through performances up to Altitudes of 25,000 feet")
![Operating a hand drill at North American Aviation, Inc., [a] woman is working in the control surface department assembling a section of the leading edge for the horizontal stabilizer of a plane, Inglewood, Calif.](https://cdn4.picryl.com/photo/1939/01/01/operating-a-hand-drill-at-north-american-aviation-inc-a-woman-is-working-in-640.jpg "Operating a hand drill at North American Aviation, Inc., [a] woman is working in the control surface department assembling a section of the leading edge for the horizontal stabilizer of a plane, Inglewood, Calif.")
![Color guard of Negro engineers, Ft. Belvoir(?), [Va.]](https://cdn4.picryl.com/photo/1939/01/01/color-guard-of-negro-engineers-ft-belvoir-va-4-640.jpg "Color guard of Negro engineers, Ft. Belvoir(?), [Va.]")
Inspecting of landing wheel of the transport planes at Willow Run
Photo shows the Willow Run manufacturing plant, run by the Ford Motor Company near Ypsilanti, Michigan, which made the B-24 Liberator bombers during World War II. (Source: Flickr Commons project, 2009)
Inspecting of landing wheel of the transport planes at Willow Run
Photo shows the Willow Run manufacturing plant, run by the Ford Motor Company near Ypsilanti, Michigan, which made the B-24 Liberator bombers during World War II. (Source: Flickr Commons project, 2009)
Installing one of the 4 motors on the transport plane at Willow Run
Photo shows the Willow Run manufacturing plant, run by the Ford Motor Company near Ypsilanti, Michigan, which made the B-24 Liberator bombers during World War II. (Source: Flickr Commons project, 2009)
Marines finishing training at Parris Island, S.C.
Photograph shows marching line of marines.
Civil Air Patrol Base, Bar Harbor, Maine
Photograph shows men exercising on air field, next to the Stinson HW-75, or 105 Voyager airplane. The design was later modified to the L-5 Sentinel for the war. (Source: Flickr Commons project, 2011) .
![[Civilian pilot training school], returning from practice flight, Meacham Field, Fort Worth, Tex.](https://cdn4.picryl.com/photo/1939/01/01/civilian-pilot-training-school-returning-from-practice-flight-meacham-field-640.jpg "[Civilian pilot training school], returning from practice flight, Meacham Field, Fort Worth, Tex.")