There's a bit of a kerfuffle on the interwebs these days, as this photo has become something of a litmus test for liberals and conservatives:
In it, a group of female, African-American Cadets pose (as many groups of students do) to recreate iconic old style photos. Except, in this one, the most iconic aspect of the photo is the raised fist, which most believe to represent "black power" or more recently, the Black Lives Matter movement.
You can read about the issue from the perspective David French at NRO, most of which I agree with. Or for a more sympathetic view, try this from the Wall Street Journal.
Bottom line: this is an overt, political statement made while in uniform, and so it is thoroughly inappropriate, irrespective of how many other photos were taken, how "young" these women are (soon to be 2nd LT's, in the Army and THEY KNOW BETTER), or your sense that it shows "strong, proud women".
Ask yourself--what would be the reaction if pictured were a bunch of white, male, cadets, but with a Confederate Flag hoisted on the two swords in the middle? Would you try to explain it away as a sign of their strength and pride?