Reuters | Oil reverses gain, falls below $61 as other commods weigh Reuters With risks to Middle East supply back on the market's radar, International Energy Agency Chief Economist Fatih Birol warned the rise of Islamic State presented a major challenge for the investment necessary to prevent an oil shortage in the next decade. Wood Group and Dragon Oil cut spending as fears over Iraq and Syria grow Oil rises to $62, near 2015 high as Mideast risks support IEA's Birol says Middle East militancy poses 'major challenge' for oil |