That would be Dr. Margaret Flowers, pediatrician, PNHP.org member, and a single payer advocate who was willing to be arrested for her belief in a single payer solution. She spoke with us after her appearance at the Medicare Birthday Rally.
And later that afternoon, she took part in a briefing on the state single payer movements, and the Kucinich amendment to H.B. 3200.
And video of her arrest, courtesy of Healthcare-Now: