See Copyright in U.S. Government works for further information. The copyright owner has clearly (and reliably) stated that you may freely use the image without obtaining permission. You've made a fair use analysis and are comfortable that your use falls within the U.S. fair use provision.
How do you know if an image is subject to copyright?
One good way to see if a photo is copyrighted is by reverse searching for the image. Right click on the image and select “copy image address”. Then paste this into Google Images or a site dedicated to reverse image search, like TinEye. This will show you where the image is used, and where it has come from.
How can I use an image without copyright infringement?
- Always ask permission to use a photo.
- Give proper credit to the creator of the photo.
- Understand the Fair Use copyright.
- Use images with Creative Commons licenses.
- Purchase stock photos.
How do I use Google images without copyright?
- Enter a search term in Google Images search.
- Click the Gear icon, then select Advanced search.
- Scroll down and use the usage rights drop down menu to select free to use or share, even commercially.