moving a picture from an attachment to the camera roll

Recently at a work Christmas party, a friend sent me an attachment with a picture that was taken of me at the party. I wanted to post it on face book. when I got the picture attachment, I double tapped on the message. I think it took me into the picture itself. I didn't hear voice over speak any of the controls withink the attachment. I couldn't move the picture into my camera roll without my friend's sighted assistance. Once she moved it into my camera roll, I was able to post it to Face Book. I'm using an iPhone 4S with IOS 6.01. Based on my lack of experience in this area, am I missing something or is that area not accessible?