It the one on man in picture at 858.
At first I thought he was Bart.
I have more pictures of him.
More pictures of badges on them. It appears they are different colors. May be the years of service or rank duties within the unit.
Bart(?) appears between 1:00 and 1:12 in this video
http://abcnews4.com/news/local/clinton-visits-lowcountry-organizations-ahead-of-primary
Also photo third from bottom
https://still4hill.com/2016/02/24/hillary-clinton-visits-sc-strong/