The securities litigation law firm of Brower Piven, A Professional Corporation, has commenced an investigation into possible breaches of fiduciary duty to current shareholders of Orbital Sciences Corp. (“Orbital” or the “Company”) (NYSE: ORB) and other violations of state law by the board of directors of Orbital relating to the proposed merger of the Company with Alliant Techsystems, Inc. (“Alliant”). Under the terms of the transaction, Alliant will first spin-off its valuable Outdoor Sports Group. Following the spin-off, Orbital shareholders will receive 0.449 shares of the remaining assets of Alliant for each share of Orbital stock they own. The transaction may undervalue Orbital as its stock has risen over 70% in the last year as a reflection of the Company’s success in launching unmanned supply ships to the International Space Station. In addition, following the merger the co-founder of Orbital will serve as the President and CEO of the merged company. If you currently own common stock of Orbital and would like to learn more about the investigation being conducted by Brower Piven, without cost or obligation to you, click here: http://www.browerpiven.com/currentinvestigations.html. You may also request more information by contacting Brower Piven either by email at firstname.lastname@example.org or by telephone at (410) 415-6616. Attorneys at Brower Piven together have more than a century of experience litigating securities and other class action cases.