President Trump today said he wants to give the U.S. military's fifth-generation fighters a makeover, including by overhauling the F-35 Joint Strike Fighter with a twin engine and a "super upgrade." “The F-35, we’re doing an upgrade, a simple upgrade. But we’re also doing an F-55 -- I’m going to call it an F-55 -- and that’s going to be a substantial upgrade, but it’s going to be also with two engines because an F-35 has a single engine. I...