A Reston-based developer plans to build a major office park in Manassas aimed at the kind of companies in the biotech, technology, biomedical and government-contracting businesses that Prince William County officials say they are trying to attract.	AT&T Government Solutions of Vienna has received a $13 million task order from the U.S. Agency for International Development to upgrade the agency's Web systems.	Deee-fense, Deee-fense Deee-fense. You can almost hear the chant rising from corporate offices all over town. As soon as Democrats take over Congress next month, all sorts of businesses will no doubt face sharp-elbowed congressional hearings called O & I -- oversight and investigations. And...
Sales of existing homes are expected to decline 8.6 percent, to 6.47 million, for 2006, and shrink another 1 percent, to 6.40 million units, next year.	Valassis Communications is suing to escape its deal to purchase Advo, a direct mail marketing company it agreed to buy for $1.3 billion.	Fewer people are rushing to cram in miles before the end of the year to upgrade to a higher frequent-flier status.