The loss of a multi-billion-dollar satellite this past January is being attributed to engineering and testing errors made by aerospace and defense firm Northrop Grumman Corporation, according to a recently concluded investigation. As the Wall Street Journal reports, a payload adapter modified by Northrop Grumman failed to operate properly during deployment, causing the $3.5 billion satellite to stay attached to the second stage Falcon 9 rocket during its descent stage. <br />
