Open house; December 09, 2018.

Find the 12 differences between the original photograph, top, and the altered photograph, center. Answers at bottom. (Degree of difficulty: advanced.) For more Second Glance puzzles, click here.

Original photo by Alan P. Goldstein; the first open house at the National Air and Space Museum at Udvar-Hazy Center in Chantilly in 2014. December 6 at 5:00 AM
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