The top real estate market in the US, as reported by Kinglsley Associates, is Washighton, DC. Washington has lowest vacancy rates, good rental growth and good capital appreciation. London, UK lead Washington, however. The top 5 US markets at the end of 2005 were Washington, New York, Los Angeles, San Francisco and San Diego. Philadelphia, Denver and Las Vegas also scored high. Do you know the US city that boasts the #1 Air Frieght Tonnage Airport in the World? .... What airport is #2? Send us your guess!