The United States, land of freedom and opportunity, is also the land of scowling faces and folded arms, according to a new poll. Travel magazine Conde Nast Traveler has unveiled the results of its annual readers' choice survey. More than 46,000 readers gave their opinions last year on everything from favorite airlines to best hotels and friendliest and unfriendliest cities. It's the latter category that might cause the most surprises, with U.S. cities dominating the "unfriendly" list. Newark, New Jersey, is the unfriendliest city in the world according to the survey. "Newark is best known for being the site of...