really? since there appears to be a light on (over the woman’s right shoulder) i am assuming this is indoor; maybe a box. the rules as per the air force.
Key regulations and some of their details are:
AIR FORCE INSTRUCTION 34-1201
4 OCTOBER 2006
2.17.2. Indoors. Military members in uniform, while in formations, should wear appropriate headgear and render the military salute at the first note of the National Anthem and maintain that position until the last note. While not wearing headgear during an indoor ceremony, military members, in formation or not, should stand at attention at the first note of the National Anthem and maintain that position until the last note without rendering the military salute. There is one exception to this. Military members in uniform, under arms, should salute. Civilians should stand at attention facing the flag with their right hand over their heart.