ABOARD THE USS AMERICA: Somewhere near San Diego on the Pacific Ocean, the Marines have been putting F-35Bs and their pilots through a series of qualifications and tests with an eye to better understanding just how the small-deck carriers, the F-35s, V-22s and combat-ready Marines can best function together.With a careful eye on both China and Russia, the Marines spent today (Sunday) executing what they are calling the Lightning Carrier Proof of Concept Demo.