OKLAHOMA — Oklahomans are invited to submit designs for a new challenge coin in honor ... is a state-of-the-art submarine that will be added to the United States Navy's fleet in 2027.

Admitting women to submarines posed a challenge for the Navy, which had to reorganize and retrofit the vessels where space is already at a premium. The USS New Jersey has been adjusted to account ...

More and more U.S. warship and submarine parts are being 3D-printed—and now the Navy is going after the ... "We can build bigger components...the challenge is some of these things get to ...