Las Vegas Strip casinos are seen from the 550 foot-tall (167.6 m) High Roller observation wheel, the tallest in the world, in Las Vegas, Nevada April 9, 2014. The wheel is the centerpiece of the $550 million Linq project, a retail, dining and entertainment district by Caesars Entertainment Corp. REUTERS/Las Vegas Sun/Steve Marcus (UNITED STATES - Tags: BUSINESS CITYSCAPE SOCIETY TRAVEL)