nice catch! I think the altitude could be calculated roughly if we knew the the day of the year the photo was taken.

okay so i'm not sure how accurate any of this is since it's overlaying sun angles over a photo that is very likely not taken from a 90deg overhead angle to the bomber... and the scale of the image may be distorted a little...

I discovered on google earth that the image was taken May 16th.

I used this site http://shadowcalculator.eu/#/lat/39.02397754136213/lng/-93.6... to draw a fence around the bomber and defined the "structure" to be an arbitrarily tall height until the sun angle lined up.

Then I lowered the height until the sun angle touched the location of the shadow and I came to an altitude of 1100ft / 335.28m (rough height of the "structure")