To me it looked like a twin engined US aircraft ( this pic should be around the US star on the fuselage ) and according to the paint it should be Olive drab all around.
As the P38 that had mirrors on the engine to look down or the configuration is absolutely not aerodynamic (with the two buttons ) so I'll look up for a pre-war or a early war aircraft, I am close ?
Apart from the twin engines, no my friend, you're not that close!
It was pre-war, but was still in service many years after WW2, and is still used, in some parts of the world, today!
Oh, and this one is not Olive Drab!