From http://www.slate.com/articles/life/dispatches/2015/07/i_was_attacked_on_the_d_c_metro_no_one_helped_me.html

I was in a window seat on the Blue Line, en route to meet friends for dinner. One teenage girl sat down next to a man in front of me; another sat beside me. They began by asking what kind of phone I had. The girl next to me patted down my pockets and, finding nothing, grabbed my coffee mug out of my hands. The girl in front put her finger in my face, getting as close as she could without touching me. They grabbed my legs. They threatened to rape me until I bled. One opened the other’s coat jacket, feigning—or not—that she had a weapon.