Bird Dog landing in a field. <br /> <br /> Airplanes and reenactors photographed at in connection with H&oslash;ytorptreffet, an annual event at the H&oslash;ytorp fort. <br /> <br /> H&oslash;ytorp fort is a barrage fort in the Glomma defence line, built 1912-17. On April 13th and 14th 1940 the fort was in combat against German army units . It is now protected as a national monument.<br /> <br /> &copy;Fredrik Naumann/Felix Features
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