Virtual Technology Corp. and The Drees Co. leased a total of 19,548 square feet at 5510 Cherokee Ave. in Alexandria, VA. Virtual Technology, a leading provider of distributed simulation products and services, leased 11,387 square feet. The Drees Company leased 8,161 square feet. The property is a 54,200-square-foot office building that underwent extensive renovations in 1993. It offers excellent access to I-395 and is minutes from Crystal City, the Pentagon and D.C. Kenneth Sweeney and W. Carter Byrnes of Insignia/ESG, Inc. represented the landlord, Advance Realty Group, in these transactions. Marc Balamaci, also of Insignia/ESG represented The Drees Co.