The Pentagon is set to cut 20 F-35 Joint Strike Fighters from the 893 it was due to build over the next five years, according to a high-ranking military member of the Lockheed Martin management team. While the figure is insignificant given that the U.S. is to build more than 2,000 through 2055, the reduction adds another layer of intrigue to an aircraft that has suffered from production glitches and manufacturing delays, and has been heavily criticized by Congress for its overall $1.5 trillion price tag.