FEW people outside Mewand district in Afghanistan's south-western Kandahar province had heard of Mulla Mohammad Umar before September 1994. A year later, this tall and well-built 34-year-old founder of the Taliban movement has emerged as probably the most powerful man in Afghanistan. As the "ameer" (head) of the Taliban Islamic movement and commander of its Mohammadi Lashkar (force), Umar now controls 14 of Afghanistan's 32provinces. After some spectacular military victories south and west of the capital, his fighters are now poised for a decisive assault on Kabul.