I wondered that too, so I googled it. Wiki says it can have many different meanings culturally but one of those is a heavy metal "rock on" meaning. Perhaps the service member or the woman giving the hand gesture is a rock fan and that's her version of a thumbs up.
Over time it's come to mean rock on, or whatever, but it definitely started out, at least, as signifying devil horns, ie, as used in <scary>SATANIC ROCK</scary>. I guess flashing the rock on/devil horns salute over the grave of your dead sibling/spouse/loved one (and the graves of other dead people you don't know) is certainly a choice.
So, yea, what IS up with the devil horn salute, there?
I wondered that too, so I googled it. Wiki says it can have many different meanings culturally but one of those is a heavy metal "rock on" meaning. Perhaps the service member or the woman giving the hand gesture is a rock fan and that's her version of a thumbs up.
Over time it's come to mean rock on, or whatever, but it definitely started out, at least, as signifying devil horns, ie, as used in <scary>SATANIC ROCK</scary>. I guess flashing the rock on/devil horns salute over the grave of your dead sibling/spouse/loved one (and the graves of other dead people you don't know) is certainly a choice.