pledges $400,000 for Washington's river trek: "Lockheed Martin vice
president and general manager Marshall Byrd also pledged a five-year commitment
of volunteer support from the company's 13,000 employees in the Delaware Valley
area for park maintenance and operations. The company, which also has major
operations in Denver and in Sunnyvale, Calif., specializes in human space flight
systems, communications satellites and missile defense systems."