Orbital Sciences Corp. (NYSE:ORB) Acquired Alliant Techsystems Inc. (NYSE:ATK)

Orbital Sciences Corp. (NYSE:ORB) Acquired Alliant Techsystems Inc. (NYSE:ATK), a company which develops and manufactures small- and medium-class rockets and space systems for commercial, military, and civil government customers in the United States, Europe, Eurasia, Mexico, South America, and East Asia.