Just like the scale North Korean airfields graded in the Nellis ranges... 37°25'44.03"N 116°51'3.09"W, 37°25'19.15"N 116°39'18.40"W & 37°21'49.14"N 116°49'39.77"W
Are you sure they're copies of North Korean airfields? They look a little too elaborate for our crazy cousins. As always with Google Earth they use a hotpotch of satellite imagery, some of it quite old - perhaps these are representations of Iraqi airfields pre-2003? Incidentally the latter two are 'recent' additions - you can see the earthmovers working on the last one.