CORRECTIONS

摘要

The news brief "U.S. Supreme Court Upholds NASA Background Checks" [Jan. 31, page 9] should have said that U.S. civil servants have been subject to background checks since 1953. The news brief "USAF Extends Space Fence Study Contracts 18 Months" [Jan. 31, page 3] should have said that the contract to build the Space Fence will be awarded through a full competition open to companies other than Lockheed Martin and Raytheon, bodi of which are recipients of preliminary design awards.