Putting to end a week-long guessing game that has obsessed media watchers and political pundits alike, billionaire Sheldon Adelson, the CEO of Las Vegas Sands Corp., was unmasked Wednesday as the new owner of the Las Vegas Review-Journal newspaper, according to Fortune magazine, which cited “multiple sources familiar with the situation.” Adelson, the top Republican donor in the 2012 presidential election, went to great lengths to remain unknown, shielding the $140 million purchase in a newly-formed, Delaware-based shell company with anonymous owners.