now the army wears special uniforms for aircrew and tankers it tends to be different, altho now they in the acu pattern there are also chemical suits that are plain. It could simply be the MARINE CORPS flame retardant suit,mechanic coveralls or chemical suit. but I think the story is a hoax
Nothing at your Snopes link proves this incident to be a hoax. Did you post the right link?
Marine tossing yelping puppy. Snopes . "Undetermined" at time of this post.