This image was acquired from
flickr. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
aerial photo aerialphoto arm test center armtestcenter texture outdoor monochrome Catalog Title Aerial Photo Additional Information Arm Test Center Tags Aerial Photo Arm Test Center Repository San Diego Air and Space Museum Archive Catalog Title Aerial Photo Additional Information Arm Test Center Tags Aerial Photo Arm Test