(Reuters) U.S. Defense Secretary James Mattis ordered cost-cutting reviews of two major aircraft acquisition programs, the F-35 fighter jet and Boeing Co’s next generation of Air Force One presidential aircraft, according to Pentagon memos released on Friday.

The review of Lockheed Martin’s F-35 program, which President Donald Trump has derided as being too expensive, would have two parts: one looking at how to lower costs, while the other would determine whether the F/A-18E/F could be an effective, lower cost alternative to the F-35C aircraft if improvements were made, the memo said.

Costs for Lockheed’s F-35 program had escalated to an estimated $379 billion. The program accounted for 20 percent of the company’s total revenue of $46.1 billion last year.

Reuters