claim: Mikhail Prokhorov was the chairman of Russia's largest gold producer from 2000 to 2005.
evidence: The Trans-Pecos , as originally defined in 1887 by the Texas geologist Robert T. Hill , is the portion of Texas that lies west of the Pecos River .. Pecos. Pecos River. Robert T. Hill. Robert T. Hill. Texas. Texas. Pecos River. Pecos River. The term is considered synonymous with `` Far West Texas '' , a subdivision of West Texas .. Texas. Texas. West Texas. West Texas. The Trans-Pecos is part of the Chihuahuan Desert , the largest desert in North America .. Chihuahuan Desert. Chihuahuan Desert. Pecos. Pecos River. largest desert in North America. List of North American deserts. It is the most mountainous and arid portion of the state , and most of its area -LRB- outside the city of El Paso -RRB- is vast and sparsely populated , comprising seven of the ten largest counties by area in Texas .. Texas. Texas. El Paso. El Paso, Texas. The area is known for the natural environment of the Big Bend and the gorge of the Rio Grande , part of which has been designated a National Wild and Scenic Rivers System .. Rio Grande. Rio Grande. Big Bend. Big Bend ( Texas ). National Wild and Scenic Rivers System. Wild and Scenic River. With the notable exceptions of Big Bend Ranch State Park and Big Bend National Park , the vast majority of the Trans-Pecos region consists of privately owned ranchland .. Pecos. Pecos River. Big Bend. Big Bend ( Texas ). Big Bend Ranch State Park. Big Bend Ranch State Park. Big Bend National Park. Big Bend National Park. ranchland. ranch. The vast majority of the region 's population reside in the El Paso metropolitan area .. El Paso. El Paso, Texas