Ultra-Orthodox Jews dance around a Lag BaOmer bonfire in Jerusalem on late April 27, 2013, marking annual Jewish holiday Lag BaOmer which has been reinterpreted as a commemoration of the Bar Kokha revolt against the Roman Empire. (Xinhua/Yin Dongxun)

Ultra-Orthodox Jews dance around a Lag BaOmer bonfire in Jerusalem on late April 27, 2013, marking annual Jewish holiday Lag BaOmer which has been reinterpreted as a commemoration of the Bar Kokha revolt against the Roman Empire. (Xinhua/Yin Dongxun)

Ultra-Orthodox Jews dance around a Lag BaOmer bonfire in Jerusalem on late April 27, 2013, marking annual Jewish holiday Lag BaOmer which has been reinterpreted as a commemoration of the Bar Kokha revolt against the Roman Empire. (Xinhua/Yin Dongxun)

Ultra-Orthodox Jews dance around a Lag BaOmer bonfire in Jerusalem on late April 27, 2013, marking annual Jewish holiday Lag BaOmer which has been reinterpreted as a commemoration of the Bar Kokha revolt against the Roman Empire. (Xinhua/Yin Dongxun)