The Department of Defense and Lockheed Martin Corp announced on Friday an agreement worth about $8.5 billion for 90 F-35 jets, the lowest price to date for the Pentagon's most expensive program. This is more than the $600 million that U.S. President Donald Trump claimed on Monday he had been able to shave off from the F-35 program, which he had described as "out of control" in December. The price per jet has been steadily declining as production ramps up, and defense analysts have said the discount hailed by Trump was in line with what had been flagged by Lockheed and Pentagon officials for months.