Washington Real Estate Investment Trust announced today that it has executed two leases totaling 154,000 square feet at Dulles Station West, Phase I. The 180,000 square foot, Class A office building located in Herndon, Virginia was delivered in the third quarter of 2007. IBM (NYSE: IBM – News) will occupy 123,000 square feet and National Student Clearinghouse will occupy 31,000 square feet, resulting in an 86% occupancy rate. National Student...