BEIRUT - Islamic State leader Abu Bakr al-Baghdadi called for attacks in Saudi Arabia, said his Caliphate was expanding across the Arab world and called for "volcanoes of jihad" across the globe in a speech purported to be in his name on Thursday.Baghdadi also said that a US-led military campaign against his group in Syria and Iraq was failing. Reuters could not independently confirm the authenticity of the speech, which was carried on jihadist websites.