I think it runs on Flash, so your browser probably wasn't compatible. Thanks for the secondary link.
I think it runs on Flash, so your browser probably wasn't compatible. Thanks for the secondary link.
I think it runs on Flash, so your browser probably wasn't compatible. Thanks for the secondary link.
Your link didn't run for me so looked for something similar,
https://www.smithsonianmag.com/history/A-Cutting-Edge-Second-Look-at-the-Battle-of-Gettysburg-1-180947921/