Aug. 18 — DUBAI (Reuters) - Al Arabiya television aired on Monday an audio tape allegedly from an al Qaeda spokesman saying Osama bin Laden and Taliban chief Mullah Omar were alive and urging Muslims to fight a holy war against U.S. troops in Iraq. Al Arabiya attributed the recording to Afghan-based al Qaeda official Abdel Rahman al-Najdi, who it said was on a U.S. list of wanted al Qaeda members. "I would like to bring the good tidings to Muslims everywhere that Sheikh Osama bin Laden is well, very well and that Mullah Omar is also alive," the voice...