The top image is Biden's "marines". They look more believable than some of the ones he's had in the past, but I'm not even sure about these ones. Is their hand placement a special form of parade rest I'm not familiar with? I never learned that in the army, but I don't know about marines so I need some confirmation. Someone on the chans said it was "hands ready" that secret service or honor guard use. The below images are honor guards in this position. It is not the same. I might be wrong, but I'm starting to question the authenticity of these marines behind him. You'd think that if they were going to pick just two marines for the iconic dictator speech, they'd pick ones that know wtf they were doing. What are these guys doing?

Edit: There is a similar shot with marines in that pose behind Trump. https://i.4cdn.org/pol/1662441293280554.jpg It seems that this is a position used with the president as was mentioned below. Thanks for checking, frens.