The Air Force has awarded a contract to Boeing to buy two 747-8 jets that will comprise the next presidential aircraft fleet, but will not disclose how much the service is paying despite touting the move as a cost-saving measure. "Because the aircraft were purchased through commercial contracting procedures, price and other related details are commercial-competition sensitive, meaning the negotiated price paid is not releasable," Air Force spokeswoman Ann Stefanek wrote in an Aug. 4 email. "However, the price will...