 In July 2016, the U.S. Air Force stated they would not release the estimated cost for the B-21 contract with Northrop Grumman.The Air Force argued releasing the cost would reveal too much information about the classified project to potential adversaries.The United States Senate Committee on Armed Services also voted to not publicly release the program's cost, restricting the information to congressional defense committees over the objections of a bipartisan group of legislators led by the committee's chairman, Senator John McCain of Arizona.