DULLES, Va.--(BUSINESS WIRE)--Orbital ATK (NYSE: OA), a global leader in aerospace and defense technologies, will feature its defense products and services as an exhibitor during LAAD Defence and Security 2015. The biennial exhibition is hosted at the RioCentro Exhibition Center in Rio de Janeiro, Brazil, April 14-17, 2015. The Orbital ATK display is located at Booth S-30 in the U.S. pavilion. LAAD 2015 provides Orbital ATK the opportunity to highlight products and services available to U.S.-al