CARL RUSSO Staff photo. Kevin,15 and his brother Derek King, 17 of Derry look at the insides of a TF34 military turbofan jet engine. The event, sponsored by the Aviation Museum of New Hampshire in Londonderry, was the second annual Experimental Amateur-Built Aircraft Fly-In, held last Saturday. The Aviation Museum is located next to the Manchester-Boston Regional Airport. 7/16/2016

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