76-yr-old Asian woman beats up attacker who punched her in face in US; video viral

A 76-year-old Asian woman in US' San Francisco beat up a man after he punched her in the face in apparently an unprovoked attack on a street. A viral video of the incident shows her with swollen eyes holding a stick and the 39-year-old man being taken to hospital on a stretcher. This comes amid protests against attacks on Asian-Americans.