Lockheed Martin said the US government is interested in its "fifth-generation-plus" idea for the F-35 stealth jet that would feature some technologies it developed for its failed bid to build the US's sixth-generation fighter. CEO Jim Taiclet said on Thursday that there is "a very active engagement at an extremely high level with the Department of Defense" about the upgraded F-35, and that "I expect it will be taken to the White House sometime soon, hopefully, to consider this kind of concept."Speaking at ...