On November 7, the New York University's Director of Studies on International Cooperation, Barnett Rubin, appeared before a hearing of the American House Committee on International Relations on "The Future of Afghanistan". He claimed that with Mazar-i-Sharif on the brink of invasion, the US was responsible to ensure that there were no reprisal killings of Taliban members by the Northern Alliance. He noted that when the city had been overrun (in 1997 and 1998), thousands had been murdered by both sides.