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The Las Vegas Valley is a major metropolitan area located in the southern part of the U.S. state.This article needs additional citations for verification.The influx of military personnel and casino job-hunters helped start a land building.Companies that originally were formed in the Las Vegas region.Las Vegas officially the City of Las Vegas and often known simply as Vegas, is the 29th-most populated city in the United States, the most populated city in the state of Nevada, and the county seat of Clark. The influx of construction workers and their families helped Las Vegas avoid economic calamity during the Great canyon.