Lockheed Martin Announces 'Centennial Flight Contest' for 2012 Farnborough International Airshow PR Newswire BETHESDA, Maryland, June 12, 2012 - Contest Offers Social Media Followers Chance to Fly Aboard a Historic Lockheed Super Constellation BETHESDA, Maryland, June 12, 2012 /PRNewswire/ -- Lockheed Martin