TASHKENT-In the mountains of Uzbekistan, archaeologists aided by laser-based remote-sensing technology have identified two lost cities that thrived along the fabled Silk Road trade route from the 6th to 11th centuries AD-the bigger one a centre for the metal industry and the other reflecting early Islamic influence. The fortified highland cities, located 5km apart at around 2, 000m to 2, 200m above sea level, are among the largest known from the mountainous sections of the Silk Road, the sprawli