(Portland, OR)  --  Portland is being listed in the top five U.S. cities for UFO sightings.  The online gambling company BetUS crunched the numbers from the National UFO Reporting Center to come up with a list of cities were you have the best odds of possibly spotting an unidentified flying object.  Portland was ranked fourth.  Phoenix, Arizona ranks first, followed by New York City.  In at number three is Las Vegas - notably not far from the famous Area 51.  Tucson, Arizona rounds out the top five.