Oil prices are wavering amid concerns of a potential global slowdown. Elsewhere, the US and its allies mull capping Russian oil prices between $40-$60 a barrel. Joseph McMonigle, Secretary General, International Energy Forum, joins the show to discuss the ongoing volatility in the oil market and the key achievements of the late OPEC Secretary General Mohammed Barkindo who passed away July 6. He speaks with Manus Cranny on "Bloomberg Daybreak: Middle East." (Source: Bloomberg)